6-oxa and thiabicyclo [3.1.0.] compounds

ABSTRACT

There are provided compounds of the formula: ##STR1## wherein R 1  is a hydrogen or C 1  -C 5  alkyl; R 2  is an C 1  -C 10  alkyl, aryl, aralkyl, or pyridyl, where the aryl, aralkyl, or pyridyl are unsubstituted or are substituted by C 1  -C 5  alkyl, C 1  -C 5  alkoxy, nitro, hydroxy, carboxy, amino, C 1  -C 5  alkylamino, C 1  -C 5  dialkyamino whose two alkyl groups may be different from each other, C 2  -C 3  alkanoylamino, or halogen and X is an C 1  -C 7  alkylene, C 2  -C 7  alkenylene, --CH(F)CH═CH(CH 2 ) 3  --, --(CH 2 ) 3  --S--(CH 2 ) 2  --, --(CH 2 ) 2  --S--(CH 2 ) 3  --, --C 6  H 4  -O--CH 2  -- or --CH 2  CH═CH--m--C 6  H 4  --, or their pharmaceutically accepatble salts. The compounds are useful as antithrombotic, anti-vasconstricting and anti-bronchoconstricting drugs.

This is a Rule 60 divisional of Ser. No. 07/327,778 filed Mar. 23, 1989now U.S. Pat. No. 4,976,891 which is a Rule 60 divisional of Ser. No.06/927,823 filed Nov. 5, 1986, now U.S. Pat. No. 4,861,913.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to new compounds used as medicines forimproving symptoms caused by thromboxane. Moreover, this inventionrelates to compounds as represented by the general formula (I) and theirsalts, which are used as antithrombotic, anti-vasoconstricting, andanti-bronchoconstricting drugs. ##STR2## wherein R₁ is hydrogen or loweralkyl; R₂ is alkyl, substituted or unsubstituted arly aralkyl orheterocycle; R₃ is hydrogen or methyl; X is alkylene or alkenylene whichmay be substituted by a fluorine atom or atoms and may contain anoxygen, sulfur and/or phenylene in the chain; Y is straight or branchedalkylene or alkenylene, oxygen, or sulfur; m indicates 0 or 1; and nindicates 0, 1 or 2, or its salt.

In detail, the compounds of this invention can be represented by thefollowing general formulae. ##STR3## wherein R₁, R₂, R₃, X and Y each isas defined above.

In more detail, the compounds of this invention can be represented bythe following general formulae (I a) to (I h). ##STR4## wherein R₁ R₂and X each is as defined above.

When thrombin acts on platelets, cyclooxygenase is activated. Byactivation of cyclooxygenase, thromboxane A₂ is produced enzymaticallyin platelets, vessel wall, and various other cells, from arachidonicacid through prostaglandins G₂ and H₂. This product has various potentphysiologic or pathogenic actions. In particular, the potent plateletagglutination action and the action constricting the smooth muscle ofbronchi and of coronary, cerebral and pulmonary arteries, etc. areconsidered to be the factors which relate to the onset and progress ofsuch circulatory and respiratory diseases as angina pectoris, myocardialinfarction, cerebral infarction, and bronchial asthma. Moreover, it issaid that the strong action occurs even at a concentration of 10⁻¹⁰-10⁻¹¹ M. Therefore, increasing attention has been paid to thedevelopment of thromboxane A₂ antagonists or inhibitors asanti-thrombotics, anti-vasoconstrictives or anti-bronchoconstrictives.Inhibitors, however, have some problems: in view of the fact that theyinfluence on prostaglandins which bear various important roles as wellas thromboxane A₂, and uncontrollable thromboxane-like harmful effectsare caused by accumulated substrates such as prostaglandins H₂. So,development of antagonists has especially been sought.

The inventors succeeded in the synthesis of the bicyclic sulfonamidederivatives represented by the general formula (I), and found that thesenew compounds have potent activity as thromboxane A₂ receptorantagonists, and are chemically and biochemically stable. The presentinvention was based on these findings.

2. Description of the Prior Art

The general course of atherosclerosis, which is regarded as the mainrisk factor of myocardial infarction and cerebral infarct, begins in thearterial intima with mucoid accumulation and fibroblast formation,progressively followed by degeneration, lipid and cholesteroldeposition, and destruction and atheromasia of the intima tissue, withgradual formation of high-degree and localized hypertrophy in theintima. The atherosclerosis has long been regarded to be caused bythrombuse formation and fibrin deposition, but recent discoveries ofthromboxane A₂ (TXA₂) by Samuelsson et al. and prostacyclin (PGI₂) byVane et al. have revealed an interaction between platelets and vesselwall. Platelets are said to play an important role in the onset andprogress of atherosclerosis. Therefore, it is now recognized that theuse of antithrombotic drugs, particularly drugs which inhibit plateletagglutination, are effective for the treatment of atheroscleroticdiseases.

In addition to the conventional antithrombotic drugs such as heparin andcoumarin compounds, certain types of prostaglandins are known to have apotent platelet agglutination inhibitory action. From these facts,prostaglandin derivatives have attracted much attention as possibleantithrombotic drugs. For example, analogues of prostaglandin E₁ and I₂receptor agonists have been developed. Since thromboxane A₂ shows potentplatelet agglutination and vasoconstriction action, thromboxane A₂synthesis inhibitors, such as cyclooxygenase inhibitors and thromboxanesynthetase inhibitors, and thromboxane A₂ receptor antagonists, havebeen developed. The thromboxane A₂ receptor antagonists include 13-APA[Venton D. L. et al., J. Med. Chem., 22, 824 (1979)], PTA₂ [Lefer A. M.et al., Proc. Natl. Acad. Sci. U.S.A., 76, 2566, (1979)], BM-13177[Lefer A. M. et al., Drugs of Today, 21, 283 (1985)], SQ-29548 [Ogletreeet al., J. Pharmacol. Exp. Ther., 34, 435, (1985)], and the compounds asdisclosed in Patent Application No. 259154/1985.

SUMMARY

Bicyclic sulfonamide derivatives represented by the formula: ##STR5##wherein R₁ is a hydrogen or lower alkyl; R₂ is an alkyl, substituted orunsubstituted aryl, aralkyl or heterocycle; R₃ is a hydrogen or methyl;X is an alkylene or alkenylene which may be substituted by a fluorineatom or atoms and may contain a oxygen, sulfur and/or phenylene in thechain; Y is straight or branched alkylene or alkenylene, oxygen, orsulfur; m indicates 0 or 1; and n indicates 0, 1 or 2, or their saltsare provided in this invention. Said compounds are used asantithrombotic, anti-vasoconstricting, and anti-bronchoconstrictingdrugs.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following definitions are given for various terms used throughoutthis specification.

The term "lower alkyl" means a straight or branched alkyl of C₁ -C₅, forexample, methyl, ethyl, n-propyl, isopropyl, butyl, pentyl and so forth.The term "alkyl" means a straight or branched alkyl of C₁ -C₁₀, forexample, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, pentyl,isopentyl, hexyl, heptyl, octyl, nonyl, decyl, and so forth. The term"aryl" includes aromatic ring radicals such as phenyl, naphthyl or thelike polycyclic aromatic hydrocarbon groups. The term "aralkyl" meansthe above-mentioned alkyl substituted by the above-mentioned aryl at anoptional position. The term "heterocycle" means nitrogen-, oxygen-and/or sulfur-containing 5- or 6-membered one, e.g., furyl, thienyl,oxazolyl, pyridyl, pyrimidyl, benzimidoyl and the like. The substituentson the aryl, aralkyl or heterocycle include lower alkyl (e.g., methyl,ethyl), lower alkoxy (e.g., methoxy), nitro, hydroxy, carboxy, cyano,amino, lower alkylamino (e.g., methylamino), lower dialkylamino (e.g.,dimethylamino) whose two alkyl groups may be different from each other,alkanoylamino (e.g., acetamide), halogens (e.g., chloro, fluoro) and soforth. The term "alkanoyl" means those of C₁ -C₃ such as formyl, acetyl,propionyl and so forth. The halogens includes fluorine, chlorine,bromine and iodine. One or more of those substituents may be located atany possible position of the group. The term "alkylene" means a C₁ -C₇alkylene, for example, methylene, ethylene, trimethylene,tetramethylene, pentamethylene, hexamethylene, heptamethylene, or thelike. The term "alkenylene" means a group having one or more doublebonds in the above-mentioned C₂ -C₇ alkylene, e.g., vinylene,1-propenylene, 2-propenylene, 1-butenylene, 2-butenylene, 3-butenylene,1,2-butadienylene, 1,3-butadienylene, 1-pentenylene, 2-pentenylene,3-pentenylene, 4-pentenylene, 1,2-pentadienylene, 1,3-pentadienylene,1,4-pentadienylene, 2,3-pentadienylene, 2,4-pentadienylene,1-hexenylene, 2-hexenylene, 3-hexenylene, 4-hexenylene, 5-hexenylene,1,2-hexadienylene, 1,3-hexadienylene, 1,4-hexadienylene,1,5-hexadienylene, 2,3-hexadienylene, 2,4-hexadienylene,2,5-hexadienylene, 3,4-hexadienylene, 3,5-hexadienylene,4,5-hexadienylene, 1-heptenylene, 2-heptenylene, 3-heptenylene,4-heptenylene, 5-heptenylene, 6-heptenylene, 1,2-heptadienylene,1,3-heptadienylene, 1,4-heptadienylene, 1,5-heptadienylene,1,6-heptadienylene, 2,3-heptadienylene, 2,4-heptadienylene,2,5-heptadienylene, 2,6-heptadienylene, 3,4-heptadienylene,3,5-heptadienylene, 3,6-heptadienylene, 4,5-heptadienylene,4,6-heptadienylene, 4,5-heptadienylene, 4,6-heptadienylene,5,6-heptadienylene, or the like. The "branched alkylene" means such asdimethylmethylene, methylethylmethylene, diethylmethylene, and the like.

In the above definition, preferable R₁ is hydrogen or lower alkyl, e.g.,methyl, ethyl or n-propyl. Preferable R₂ alkyl, e.g., methyl, ethyl,propyl, isopropyl, butyl, sec-butyl, pentyl, isopentyl, hexyl, heptyl,octyl, nonyl, decyl, and so forth, substituted or unsubstituted aryl,e.g., phenyl, o-tolyl, m-tolyl, p-tolyl, 4-ethylphenyl, 4-pentylphenyl,4-carboxyphenyl, 4-acetylphenyl, 4-(N,N-dimethylamino)phenyl,4-nitrophenyl, 4-hydroxyphenyl, 4-methoxyphenyl, 4-fluorophenyl,4-chlorophenyl, aralkyl, e.g., benzyl, phenethyl, naphthyl, orheterocycle, e.g., pyridyl. R₃ is hydrogen or methyl. Preferable X is a2-butenylene, hexamethylene, 2-hexenylene, 1-fluoro-2-hexenylene,trimethylenethioethylene, ethylenethiotrimethylene,phenylenoxymethylene, 2-propenylene-m-phenylene, or the like. PreferableY is a methylene, ethylene, vinylene, dimethylmethylene, oxygen orsulfur.

Illustrative of the compounds (I) of the invention are as follows:

5(Z)-7-(endo-3-Methanesulfonamidobicyclo[2.2.1]hept-exo-2-yl)-5-heptenoicacid

5(Z)-7-(endo-3-Hexanesulfonamidobicyclo[2.2.1]hept-exo-2-yl)-5-heptenoicacid

5(Z)-7-(endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl)-5-heptenoicacid

5(Z)-7-[endo-3-(4-Methoxybenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(4-Nitrobenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(4-Dimethylaminobenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(o-Toluenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(p-Toluenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(m-Toluenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(4-Ethylbenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(4-Pentylbenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(4-Carboxybenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(4-Hydroxybenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(4-Fluorobenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(4-Chlorobenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-Phenylmethanesulfonamidobicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(2-Phenylethanesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(2-Naphthalenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-(2-Pyridinesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid

7-[endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl]heptanoic acid

3(Z)-5-[endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl]-3-pentenoicacid

3(Z)-5-[endo-3-(4-Chlorobenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-3-pentenoicacid

3(Z)-5-[endo-3-(p-Toluenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-3-pentenoicacid

3(Z)-5-[endo-3-(4-Fluorobenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-3-pentenoicacid

3(Z)-5-[endo-3-(4-Carboxybenzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-3-pentenoicacid

3-[3-(endo-3-Benzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-1(Z)-1-propenyl]benzoicacid

3-[3-(endo-3-Benzenesulfonamido)bicyclo[2.2.1]hept-exo-2-yl]-1(E)-1-propenyl]benzoicacid

4-(endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl)phenoxyaceticacid

7-(endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl)-4-thiaheptanoicacid

7-(endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl)-5-thiaheptanoicacid

5(Z)-7-(endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl)-7-fluoro-5-heptenoicacid

5(Z)-7-(endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-5-enexo-2-yl)-5-heptenoicacid

5(Z)-7-(exo-3-Benzenesulfonamido-4,7,7-trimethylbicyclo[2.2.1]hept-endo-2-yl)-5-heptenoicacid

5(Z)-7-(endo-3-Benzenesulfonamidobicyclo[2.2.1]hept-endo-2-yl)-5-heptenoicacid

5(Z)-7-(exo-3-Benzenesulfonamidobicyclo[2.2.1]hept-endo-2-yl)-5-heptenoicacid

5(Z)-7-(exo-3-Benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl)-5-heptenoicacid

5(Z)-7-(exo-3-Benzenesulfonamido-7-oxabicyclo[2.2.1]hept-endo-2-yl)-5-heptenoicacid

5(Z)-7-(exo-3-Benzenesulfonamido-7-oxabicyclo[2.2.1]hept-exo-2-yl)-5-heptenoicacid

5(Z)-7-(endo-3-Benzenesulfonamido-7-oxabicyclo[2.2.1]hept-exo-2-yl)-5-heptenoicacid

5(Z)-7-(endo-3-Benzenesulfonamido-7-oxabicyclo[2.2.1]hept-endo-2-yl)-5-heptenoicacid

5(Z)-7-(exo-3-Benzenesulfonamidobicyclo[2.2.2]oct-endo-2-yl)-5-heptenoicacid

(1β,2α,3β,5β)-7-5(Z)-(3-Benzenesulfonamidobicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1β,2α,3α,5β)-7-5(Z)-(3-Benzenesulfonamidobicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1α,2α,3β,5α)-7-5(Z)-(3-Benzenesulfonamidobicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1β,2α,3β,5β)-7-5(Z)-(3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1α,2α,3β,5α)-7-5(Z)-(3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1α,2α,3β,5α)-7-5(Z)-(3-Benzenesulfonamido-6-oxabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1α,2α,3α,5α)-7-5(Z)-(3-Benzenesulfonamido-6-oxabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1β,2α,3β,5β)-7-5(Z)-(3-Benzenesulfonamido-6-oxabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1β,2α,3α,5β)-7-5(Z)-(3-Benzenesulfonamido-6-oxabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1β,2α,3β,5β)-7-5(Z)-(3-Benzenesulfonamido-6-thiabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1α,2α,3α,5α)-7-5(Z)-(3-Benzenesulfonamido-6-thiabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

(1α,2α,3β,5α)-7-5(Z)-(3-Benzenesulfonamido-6-thiabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid

5(Z)-7-[endo-3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-exo-2-yl]-5-heptenoicacid

5(E)-7-[endo-3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[exo-3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-exo-2-yl]-5-heptenoicacid

5(E)-7-[exo-3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-exo-2-yl]-5-heptenoicacid

5(Z)-7-[endo-3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-endo-2-yl]-5-heptenoicacid

5(Z)-7-[exo-3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-endo-2-yl]-5-heptenoicacid

and their optically active isomers and their salts.

The salts of the compounds represented by general formula (I) caninclude, for example, alkali metal salts such as lithium salt, sodiumsalt, and potassium salt, alkaline earth metal salts, such as calciumsalt, ammonium salt, salts with organic bases such as triethylamine,dicyclohexylamine, N-methylmorpholine, and pyridine, and salts withamino acids such as glycine, valine, and alanine.

In the following reaction schemes, the respective compounds arerepresented by one of the enantiomers in each step. The absoluteconfiguration of the optically active compounds are indicated by the Rand S designation in their compound number. ##STR6##

STEP 1

In this step, an allyl group is introduced into the active methylene ofthe compound I. An allylating agent such as allyl halide, e.g., allylchloride, allyl bromide, or allyl iodide, is used in this step. As acatalyst, such a relatively strong base as sodium amide, potassiumtert-butoxide, sodium hydride, or lithium diisopropylamide may be used.It is desirable to use as a solvent ethers such as tetrahydrofuran,ether, glyme, or diglyme. The reaction is achieved at a temperature of-78° C. to 25° C. for a period of several minutes to several hours.

STEP 2

In this step, the 3-ketone of the compound II is converted into theoxime. The oxime formation may be carried out using hydroxylaminehydrochloride or sodium hydroxyamidosulfate in the presence of a base.As a base, potassium hydroxide, sodium carbonate, or sodium acetate isused and as a solvent methanol or ethanol is used. The reaction iscarried out at room temperature for a period of several tens of minutesto several hours.

STEP 3

In this step, the oxime III is reduced into the amine IV-1, which isthen protected without purification. The reduction may be achieved witha reducing agent such as zinc/hydrochloric acid, stannouschloride/hydrochloric acid, or lithium aluminum hydride in a solventsuch as ether, tetrahydrofuran, diglyme, ethanol, or methanol. Thisreaction is effected at room temperature or under refluxing for severalhours. As an amino-protecting group, those ordinarily used as aprotecting group such as benzyloxycarbonyl, tert-butoxycarbonyl, ortriphenylmethyl may be used. In this reaction, a base such as pyridine,4-dimethylaminopyridine, or triethylamine may be added as required. As asolvent, dichloromethane or chloroform may be used and the reaction iscarried out at room temperature for a period of several tens of minutesto several hours.

STEP 4

In this step, the double bond of allyl group of the compound IV-2 isoxidized into epoxide. As an oxidizing agent, a combination of hydrogenperoxide and transition metal, peroxy acid or peroxy acid ester such asperformic acid, peracetic acid, perbenzoic acid, monoperphthalic acid,monopermaleic acid, pertrifluoroacetic acid, m-chloroperbenzoic acid, orp-nitroperbenzoic acid may be used. As a solvent, ethers such as ethers,ether or tetrahydrofuran, alcohols such as, methanol or ethanol, orchlorinated hydrocarbons such as dichloromethane or chloroform. Thereaction is carried out at 0° C. to room temperature for several minutesto several hours.

STEP 5

In this step, the epoxide V is converted into the aldehyde VI losing onecarbon through the oxidative cleavage of the glycol resulted byhydration. As an oxidizing agent which also serves as a hydratingcatayst, periodic acid or orthoperiodic acid may be used. It isdesirable to use a solvent which is miscible with water, such as ether,tetrahydrofuran, dioxan, methanol, or ethanol. The reaction is carriedout at room temperature for several tens of minutes to several hours.The compound IV-2 may be converted into the compound VI in one step byozonolysis, which corresponds to the simultaneous reactions of Steps 4and 5.

STEP 6

In this step, the aldehyde VI is allowed to react with an ylide togenerate a double bond and then, without purification, the resultingcompound is esterified in order to protect the carboxy group. Thereaction which generates a double bond may be processed in accordancewith the conventional Wittig reaction. The ylide used in the reaction isprepared from triphenylphosphine by reaction with a halide of desiredalkyl to be condensed such as 5-bromopentanoic acid in the presence of abase. As a base, sodium dimsyl, potassium dimsyl, potassiumtert-butoxide, sodium hydride, n-butyl lithium, or diisopropylamide areexemplified. This reaction may be carried out in a solvent such asether, tetrahydrofuran, n-hexane, or dimethylsulfoxide at roomtemperature for several hours. The esterification reaction may beachieved in a usual method using diazomethane or dimethyl sulfate withdiazabicyclononene or diazadicyclononene.

STEP 7

In this step, the double bond of the side chain of the compound VII isreduced by catalytic hydrogenation into a single bond and at the sametime the amino-protecting group is removed reductively to give theintermediate amine VIII. The hydrogenation reaction may be achieved withsuch a catalyst as platinum metal, palladium-carbon, or nickel underusual or moderately increased pressure of hydrogen. As a solvent, ether,tetrahydrofuran, dioxane, methanol, or ethanol may be used. Thisreaction may be completed at room temperature within several hours.

STEP 8

In this step, the aldehyde VI is allowed to react with an ylide togenerate a double bond. The ylide used may be prepared from3-halogenopropanol, of which the hydroxy group is protected, forexample, with tetrahydropyranyl, by reacting with triphenylphosphine inthe presence of a base. As a halogen, chloro or bromo and as a base,sodium hydride, n-butyl lithium, sodium dimsyl or potassium dimsyl areexemplified. This reaction is carried out in a solvent such as ether,tetrahydrofuran, n-hexane or dimethylsulfoxide at room temperature forseveral hours.

STEP 9

In this step, the hydroxy-protecting group of the compound IX is removedby acid hydrolysis and the resulting alcohol is oxidized into thealdehyde. It is desirable to use such an acid catalyst as hydrochloricacid, sulfuric acid or p-toluenesulfonic acid in the acid hydrolysis. Asa solvent, tetrahydrofuran, methanol, ethanol, acetone, or acetonitrilemay be used singly or as a mixture, usually as an aqueous mixture. Thereaction is carried out at room temperature or under heating for severalminutes to several hours. In the oxidation of the alcohol into thealdehyde, dimethylsulfoxide combined with an appropriate activator maybe used as an oxidizing agent. An activator such as thionyl chloride,sulfuryl chloride, phosgen, or oxalyl chloride may be used. Ifnecessary, a base such as triethylamine or diethylmethylamine may beadded.

STEP 10

In this step, the aldehyde X is allowed to react with an ylide togenerate a double bond. The reaction may be achieved in accordance withthe manner of Step 8 using an ylide or anion prepared from methyl2-bromoacetate and triphenylphosphine or trialkylphosphonacetate,respectively.

STEP 11

In this step, the double bond of the side chain of the compound IX isreduced into a single bond. The reaction may be achieved in accordancewith the manner of Step 7. In case the amino-protecting group is removedsimultaneously with the reduction, the amino group is reprotected withan amino-protecting group such as benzyloxycarbonyl in the presence of abase such as pyridine, 4-dimethylaminopyridine, or triethylamine. Thereaction may be carried out in a solvent such as dichloromethane orchloroform at room temperature for several tens of minutes to severalhours.

STEP 12

In this step, the hydroxy-protecting group of the compound XII isremoved by acid hydrolysis and then the resulting alcohol is oxidizedinto aldehyde. This step is achieved in accordance with the same manneras Step 9.

STEP 13

In this step, the aldehyde XIII is allowed to react with an ylide togenerate a double bond. This step may be achieved in accordance with thesame manner as Step 10.

STEP 14

In this step, a monosubstituted acetylene metal derivative is added tothe aldehyde VI and then the carboxy group is protected byesterification. Dilithium compound of 4-pentynoic acid may be used as acompound to be added. A solvent such as liquid ammonia, ether,tetrahydrofuran, glycol ether, or dimethylformamide may be used. Theesterification of carboxylic acid may be achieved by diazomethane in ausual manner.

STEP 15

In this step, the hydroxy group of the compound XV is acetylated andthen the triple bond of the resulting compound is rearranged to theallene XVI. The acetylation is carried out with an acylating agent suchas acetic anhydride or acetyl chloride in a solvent such as ether,tetrahydrofuran, benzene, or pyridine. A base such as pyridine,triethylamine, 4-dimethylaminopyridine may be added, if necessary. Therearrangement is achieved by reacting the compound with dimethyl copperlithium as an attacking agent followed by hydrolysis of the resultingcompound with a catalyst such as hydrochloric acid or hydrobromic acid.If necessary, lithium aluminum hydride may be added.

STEP 16

In this step, the aldehyde VI is allowed to react with an ylide which isprepared by reacting triphenylphosphine and with a halogenomethyl etherin the presence of a base to give the enol ether XVII. The halogen meanschloro or bromo. This step is achieved by reacting in accordance withthe manner of Step 8.

STEP 17

In this step, the enol ether XVII is hydrolyzed with an acid to give thealdehyde XVIII. An acid such as perchloric acid or sulfuric acid is usedas an acid catalyst. A solvent such as water or dioxane is used. Thereaction is carried out under refluxing for a period of several tens ofminutes to several hours.

STEP 18

In this step, the aldehyde XVIII is allowed to react with an ylide togenerate a double bond. The reaction may be achieved in accordance withthe manner of Step 8 using an ylide prepared from methyl4-bromobutanoate or methyl 4-chlorobutanoate by reacting withtriphenylphosphine.

STEP 19

In this step, the amino-protecting group of the compounds VII, IX, XIV,XVI or XIX prepared in Step 6, 10, 13, 15, or 18, respectively isremoved to give the amine XX as an intermediate from which the compoundsof the present invention are prepared. The reaction is carried out, forexample, in a conventional way with trifluoroacetic acid and anisoleunder warming for several hours. The product may be used in the form oftrifluoroacetate salt in the subsequent reaction, but, according tonecessity, it may be converted into the free amine XX-2 by treatmentwith an adequate base such as sodium carbonate or sodiumhydrogen-carbonate.

STEP 20

In this step, the free-amine VIII or XX-2, or its salt XX-1 is allowedto react with a substituted sulfonic acid halide in the presence of abase to give the sulfonamide derivatives XXI. As a substituted sulfonicacid halide, which has a substituent as described before, e.g.,methanesulfonyl chloride, ethanesulfonyl chloride, propanesulfonylchloride, butanesulfonyl chloride, pentanesulfonyl chloride,hexanesulfonyl chloride, heptanesulfonyl chloride, octanesulfonylchloride, benzenesulfonyl chloride, methoxybenzenesulfonyl chloride,nitrobenzenesulfonyl chloride, hydroxybenzenesulfonyl chloride,toluenesulfonyl chloride, ethylbenzenesulfonyl chloride,aminobenzenesulfonyl chloride, acetylaminobenzenesulfonyl chloride, ordimethylaminobenzenesulfonyl chloride or the like is exemplified. In thereaction, a base such as pyridine or triethylamine and a solvent such asdichloromethane, chloroform, ether, tetrahydrofuran, or benzene areused.

STEP 21

In this step, the ester XXI is hydrolyzed into the carboxylic acidXXII-1. The hydrolysis may be carried out in a conventional manner.Hydrochloric acid, sulfuric acid, sodium hydroxide, potassium hydroxide,or barium hydroxide, is used as a catalyst. Solvents such as aqueousmethanol, aqueous ethanol, aqueous acetone, or aqueous acetonitrile isused. In this step, the compounds of this invention are obtained.According to necessity, the carboxylic acid can be converted into thecarboxylate XXII-2 by conventional treatment with a base such as sodiummethoxide, sodium hydroxide, potassium hydroxide, calcium hydroxide,ammonium hydroxide, methylmorpholine, pyridine, triethylamine, orglycine. ##STR7##

PROCESS I-2

The starting compounds (III a(2S*-t)) may be prepared from the compoundIV-1 (see Reaction Scheme I-1) on the reaction with a substitutedsulfonic acid chloride and the subsequent epoxidation and oxidation (seeStep 5 of Process I-1).

STEP 1

In this step, the aldehyde III a(2S*-t) is converted into the enol silylether III a2'(2S*-t) with a silylating agent in the presence of a base.A base such as Hunig base, diazabicycloundecene or the like may be used.A silylating agent such as trimethylsilyl chloride,dimethyl-tert-butylsilyl chloride, trimethylsilyl triflate,bis(trimethylsilyl)acetamide or the like is used in a conventionalmanner (P. Brownbride, Synthesis, 1-28(1983)). As a solvent, chlorinatedhydrocarbon, e.g., dichloromethane, ethereal solvent, e.g., diethylether, tetrahydrofuran or diglyme, or N,N-dimethylformamide is used. Thereaction is achieved completely at room temperature for a day.

STEP 2

In this step, the enol silyl ether III a2'(2S*-t) prepared from thealdehyde is converted into the α-fluoroaldehyde by reacting with anelectrophilic fluorinating agent. As an electrophilic fluorinatingagent, xenon difluoride, perchloric fluoride, trifluoromethylhypofluorite, fluorine gas, acetyl hypofluorite, N-fluoropyridone,N-fluoro-N-alkyl-p-toluenesulfonamide, cesium fluorosulfate or the likeis used. As a solvent, chlorinated hydrocarbon, e.g., dichloromethane,or acetonitrile or ethyl acetate may be used. The reaction may becarried out at a temperature of -78° C. to 0° C. or under ice-coolingfor several hours.

STEP 3

In this step, the fluoroaldehyde III a2(2S*-t) is allowed to react witha fluoro-substituted or unsubstituted ylide to give the compound Ia2(2S*-t) of the present invention. The reaction with the aldehyde andthe ylide may be carried out in a conventional manner for the Wittigreaction. In this step, the bicyclic sulfonamide derivatives possessingfluoride in 2-side chain is prepared. Depending on the reactionconditions, the reaction affords either of the Z-form compound alone ora mixture of Z-form and E-form compounds. The fluoro-ylide can beprepared from halide of fluoroalkanoic or alkenoic acid possessing acarboxyl group at the ω-position. The free carboxylic acid I a2-b(2S*-t)of the present invention may be esterified to give the carboxylate esterI a2-a(2S*-t) or converted into the carboxylate salt I a2-c(2S*-t) in aconventional manner.

                  TABLE 2                                                         ______________________________________                                         ##STR8##                                                                     R.sub.2     .sup.1 HNMR (CDCl.sub.3): δ ppm                             ______________________________________                                         ##STR9##   0.85˜2.05(m, 10H), 2.16(brs, 1H), 2.96 (d, J=7Hz, 2H),                  3.00(m, 1H), 3.68(s, 3H), 5.14(d, J=7Hz, 1H),                                 5.20˜5.65(m, 2H), 7.46(A.sub.2 B.sub.2 type, Apart,                     J=8Hz, 2H), 7.82(A.sub.2 B.sub.2 type, Bpart, J=8Hz, 2H)           ##STR10##  0.80˜2.00(m, 10H), 2.16(brs, 1H), 2.41 (s, 3H), 2.92(d,                 J=7Hz, 2H), 2.96(m, 1H), 3.66(s, 3H), 5.17(d, J=7Ha, 1H),                     5.23˜5.55(m, 2H), 7.29(A.sub.2 B.sub.2 type, Apart,                     J=8Hz, 2H), 7.75(A.sub.2 B.sub.2 type, Bpart, J=8Hz, 2H)           ##STR11##  0.86˜2.06(m, 10H), 2.15(brs, 1H), 2.96 (d, J=7Hz, 2H),                  2.98(m, 1H), 3.67(s, 3H), 5.18˜5.54 (m, 2H), 5.56(d,                    J=7Hz,  1H), 7.08˜7.30(m, 2H), 7.84˜9.03(m, 2H)        ##STR12##  0.86˜2.02(m, 10H), 2.16(brs, 1H), 2.32 (s, 3H), 2.96(d,                 J=7Hz, 2H), 2.97(m, 1H), 3.67(s, 3H), 5.17˜5.60(m, 2H),                 5.61 (d, J=7Hz, 1H), 7.25(A.sub.2 B.sub.2 type, Apart, J=8Hz,                 2Hz), 7.93(A.sub.2 B.sub.2 type, Bpart, J=8Hz, 2H)                 ##STR13##                                                                     ##STR14##  0.90˜2.05(m, 10H), 2.13(brs, 1H), 2.80˜3.15(m,                    3H), 5.20˜5.65(m, 2H), 5.54 (d, J=8Hz, 1H),                             7.46(A.sub.2 B.sub.2 type, Apart, J=8Hz, 2H), 7.81 (A.sub.2                   B.sub.2 type, Bpart, 2H), 9.20(brs, 1H)                            ##STR15##  0.85˜2.00 (m, 10H), 2.16(brs, 1H), 2.41 (s, 3H),                        2.80˜3.200(m, 3H), 5.15˜5.63(m, 3H), 7.27(A.sub.2                 B.sub.2 type, Apart, J=8Hz, 2H), 7.77(A.sub.2 B.sub.2 type,                   Bpart, J=8Hz, 2H), 9.31(brs, 1H)                                   ##STR16##  0.88˜2.03(m, 10H), 2.16(brs, 1H), 2.90˜3.18(m,                    3H), 5.18(d, J=7Hz, 1H), 5.25˜5.65(m, 2H), 6.59(brs,                    1H), 7.09˜7.28(m, 2H), 7.82˜7.98(m, 2H)                ##STR17##  0.98˜2.00(m, 10H), 2.13(brs, 1H), 2.80˜3.13(m,                    3H), 5.25˜5.62(m, 2H), 6.91 (A.sub.2 B.sub.2 type,                      Apart, J=8Hz, 2H), 7.73 (A.sub.2 B.sub.2 type, Bpart, J=8Hz,                  2H)                                                               ______________________________________                                         ##STR18##

PROCESS I-3a STEP 1

In this step, a thiol is added to the double bond of the compound IV a.As the thiol, mercaptoalkanoic acid ester, e.g., 2-mercaptoacetic acidmethyl ester, 3-mercaptopropionic acid methyl ester or 4-mercaptobutyricacid methyl ester may be used. As a catalyst, oxygen, peroxide,azobisisobutyronitrile or the like is used. This reaction may beachieved at room temperature for a period of several hours to severaltens of hours.

In this step, the carboxylate esters I a3-a(2S*-t) of sulfonamidederivatives, the compounds of the present invention of which the 2-sidechain contains sulfur, are prepared. The carboxylate ester is convertedinto the free carboxylic acid I a3-b(2S*-t) or the carboxylate salt Ia3-c(2S*-t) by treating in accordance with the manner of Process I-1,step 21.

PROCESS I-3b STEP 1

In this step, the aldehyde VI is reduced to alcohol 1. As a reducingagent, metal hydride, e.g., lithium aluminium hydride, sodiumborohydride, sodium bis(2-methoxyethoxy)aluminium hydride, diisobutylaluminium hydride, lithium trimethoxyaluminium hydride, or lithiumtri-tert-butoxy aluminium hydride may be used. As a solvent, etherealsolvent, e.g., diethyl ether or tetrahydrofuran, or aromatic solvent,benzene or toluene may be exemplified. The reaction is achieved undercooling or at room temperature for a period of several tens of minutesto several hours.

STEP 2

In this step, the hydroxy group of the compound 1 is converted into aleaving group. As a leaving group, halogen, e.g., chlorine or bromine,or sulfonate, e.g., methanesulfonate, benzenesulfonate orp-toluenesulfonate is exemplified. In the case where the hydroxy groupis replaced by a halogen, the compound 1 is allowed to react with ahalogenating agent, e.g., hydrogen halide, phosphorus halide, thionylchloride, and in the case of the sulfonate, the compound 1 is allowed toreact with a corresponding sulfonyl chloride in a conventional manner.

STEP 3

In this step, the compound 1a is allowed to react with a thiol to givethe sulfide II a4(2S*-t). As a thiol used in this step,mercapto-alkanoic acid ester or alkenoic acid ester possessing acarboxyl group at the ω-position, e.g., 2-mercaptoacetic acid methylester, 3-mercaptopropionic acid methyl ester, 4-mercaptobutyric acidmethyl ester, or 5-mercaptopentanoic acid methyl ester is exemplified. Abase such as sodium methoxide is used. As a solvent, aprotic solvent,e.g., dimethylformamide, dimethylacetamide, N-methyl-α-pyrrolidone,diethyl ether, tetrahydrofuran, acetone or acetonitrile is used. Thereaction is achieved at room temperature or under heating for a periodof several tens of minutes to several hours.

STEP 4

In this step, the compound II a4(2S*-t) is converted into thesulfonamide derivatives, compounds of the present invention. This stepis carried out in accordance with Process I-1 steps 19 to 21. In thisstep, the carboxylate ester I a4-a(2S*-t) of the present invention.

In this step, the carboxylate ester I a4-a(2S*-t) of sulfonamidederivatives, of which the 2-side chain possesses a sulfur atom, the freecarboxylic acid I a4-b(2S*-t), or the carboxylate salt I a4-c(2S*-t) isprepared. ##STR19##

PROCESS I-4 STEP 1

In this step, the carboxy group of the compound 1 is esterified. Theesterification may be carried out by one of the following conventionalmethods: a method employing diazomethane; and a method employingdimethyl sulfate in the presence of a base such as diazabicyclononene ordiazabicycloundecene.

STEP 2

In this step, the compound 1a is allowed to react with a dienophile togive the compound 2 of six-membered ring system. This reaction is wellknown as "Diels-Alder reaction" or 4π+2π cycloaddition reaction. Thediene generally reacts with the dienophile under atmospheric pressure orhigher pressure at room temperature or higher temperature. A variety ofcatalysts such as zinc chloride, boron trifluoride-etherate, aluminumchloride, titanium tetrachloride or stannic chloride and the otherLewis' acids are usually employed under milder conditions and the adductis obtained in good yields. Although the reaction is performed withoutany solvents, if required, organic solvents such as ethereal, e.g.,diethyl ether, tetrahydrofuran or diglyme, aromatic solvent, e.g.,benzene or toluene, chlorinated hydrocarbon, e.g., dichloromethane orchloroform, alcohol, e.g., methanol, ethanol or propanol, orhydrocarbon, e.g., hexane or heptane may be used.

STEP 3

In this step, the carboxy group of the compound 2 is protected byesterification and the phenolic hydroxy is alkylated to give the ether3.

The esterification of the carboxy group may be carried out in aconventional manner; the compound 2 is allowed to react with benzylalcohol, diphenyldiazomethane, triphenylmethyl chloride,phthalimidomethyl chloride, 4-picolyl chloride, or the like in thepresence of a catalyst such as hydrochloric acid, sulfuric acid ortriethylamine, if necessary in a solvent such as alcohol, e.g., methanolor ethanol, chlorinated hydrocarbon, e.g., dichloromethane orchloroform, ethereal solvent, e.g., diethyl ether or tetrahydrofuran, orethyl acetate or dimethylformamide. This reaction may be achieved underwarming for a period of several tens of minutes to several hours.

The O-alkylation may be carried out by treating the compound with analkyl halide. As the alkyl halide used in this reaction, bromoaceticacid methyl ester, bromopropionic acid methyl ester, iodoacetic acidmethyl ester, iodopropionic acid methyl ester or the like isexemplified. The reaction is carried out as follows; the compound isconverted into the sodium phenolate beforehand, which is treated withthe alkyl halide, or the compound is treated with the alkyl halide inthe presence of anhydrous potassium carbonate in a solvent such asacetone or methyl ethyl ketone.

STEP 4

In this step, the carboxy-protecting group of the compound 3 is removedand the resulting carboxy group is converted into the azide, which isthen allowed to react with an alcohol to give the urethane II a5(2S*-t).This process can be achieved by the Curtius rearrangement; that is, thereaction of either of the intermediate acid chloride or acid anhydridewith sodium azide; the acid chloride is prepared by treating the carboxygroup with thionyl chloride, phosphoryl chloride, or phosphoruspentachloride; the acid anhydride is obtained by the reaction of thecarboxy group with ethyl chloroformate or isobutoxycarbonyl chloride inthe presence of a base catalyst such as triethylamine or4-dimethylaminopyridine in a solvent such as acetone, dimethylformamide,dimethylsulfoxide, ethyl acetate, or tetrahydrofuran under cooling for aperiod of several tens of minutes to several hours. The isocyanate canbe prepared by refluxing the azide compound in benzene, toluene, ordiphenyl ether for a period of several tens of minutes to several hours.The alcohol used in the reaction with the isocyanate includes thosegiving an urethane which can readily be converted into the desiredprimary amine, for example, isobutanol, tert-butanol,diisopropylmethanol, cyclopentanol, cyclohexanol, benzyl alcohol,diphenylmethanol, or triphenylmethanol. This reaction can be carried outunder refluxing for several hours in a solvent such as benzene,dichloromethane, chloroform, or ethyl acetate in the presence of a basesuch as triethylamine, 4-dimethylaminopyridine, or4-pyrrolidinopyridine, as required.

STEP 5

In this step, the compound II a5(2S*-t) is converted into thesulfonamide derivatives I a5(2S*-t), the compound of the presentinvention. This step may be carried out in accordance with the manner ofProcess I-1, Steps 19-21. In this step, the carboxylate ester Ia5-a(2S*-t) of the present invention possessing phenyloxy in the 2-sidechain; the free carboxylic acid I a5-b(2S*-t); or the carboxylate salt Ia5-c(2S*-t) is prepared. ##STR20##

PROCESS I-5 STEP 1

In this step, one of the double bonds of the compound 1 is selectivelyreduced to give the compound 2. Employing palladium, platinum oxide,nickel boride, or chlorotris(triphenylphosphine)rhodium as a reducingagent, and methanol, ethanol, ether, tetrahydrofuran, dioxane,dichloromethane, chloroform, or benzene singly or a mixture as asolvent, the reaction of this step is completed in several tens ofminutes to several hours at room temperature.

STEP 2

In this step, the double bond of the compound 2 is oxidatively cleavedto give aldehyde, which is further oxidized to give dicarboxylic acid 3.The oxidative cleavage of the double bond may be achieved by aconventional method for ozonization and subsequent reductivedecomposition of the intermediate ozonide. The ozonization may becarried out in a solvent, for example, benzene, carbon tetrachloride,chloroform, dichloromethane, ether, tetrahydrofuran, ethyl acetate,acetic acid, methanol, ethanol, or water; the reaction is completed inseveral tens of minutes to several hours under cooling. The reductivedecomposition of the ozonide proceeds in water, acetic acid,trifluoromethane, ethyl chloride, or carbon tetrachloride, with zincdust, sodium iodide, sulfur dioxide, sodium hydrogensulfite, tin (II)chloride, or iron (II) sulfate as a reducing agent, and is completed inseveral minutes to several hours at room temperature. In the oxidationof the aldehyde into the carboxylic acid, it is appropriate to use anoxidizing agent such as Jones reagent, potassium permanganate, silveroxide or nitric acid together with a catalyst such as sulfuric acid,when necessary. It is desirable to use as solvent in this reaction wateror those miscible with water such as acetone, tetrahydrofuran, methanol,and ethanol. The reaction is completed after several hours at roomtemperature.

STEP 3

In this step, the compound 3 is converted into the ester 4 in order toprotect the 2-carboxymethyl group. For selective protection, thecompound 3 is dehydrated into the corresponding acid anhydride, which isthen applied to alcoholysis for esterification. The dehydration isperformed by heating with a dehydrating agent such as acetic anhydride,trifluoroacetic anhydride, heptanoic anhydride, benzoic anhydride,p-chlorobenzoic anhydride, phosphorus pentoxide, acetyl chloride,thionyl chloride, or sulfonyl chloride, as required. This reaction canbe achieved in a solvent such as toluene or xylene by heating forseveral minutes. The esterification can be achieved by refluxing theacid anhydride for several tens of minutes to several hours in analcohol such as methanol, ethanol, propanol, isopropanol, butanol,tert-butanol, or in phenol. The reaction can be promoted by addingeither an acid such as hydrochloric acid, sulfuric acid,p-toluenesulfonic acid or zinc chloride, or a base such as sodiumhydroxide, potassium hydroxide, barium hydroxide, sodium acetate,pyridine, 4-dimethylaminopyridine, or triethylamine.

STEP 4

In this step, 3-carboxy group of the compound 4 is converted into theazide, which is then rearranged into the isocyanate, which is thenallowed to react with an alcohol to yield the urethane 5. This processcan be achieved by the Curtius rearrangement; that is, the azidecompound is obtained by the reaction of sodium azide with either of theacid chloride or acid anhydride; the acid chloride is prepared bytreating the carboxy group with thionyl chloride, phosphoryl chloride,or phosphorus pentachloride; the acid anhydride is obtained by allowingthe carboxyl group to react with ethyl chloroformate orisobutoxycarbonyl chloride in the presence of a basic catalyst such astriethylamine or 4-dimethylaminopyridine in a solvent such as acetone,dimethylformamide, dimethylsulfoxide, ethyl acetate, or tetrahydrofuranfor several tens of minutes to several hours under cooling. Theisocyanate can be prepared by refluxing the azide compound in benzene,toluene, or diphenyl ether for several tens of minutes to several hours.The alcohol which reacts with the isocyanate includes those giving anurethane which might readily yield the desired primary amine, forexample, isobutanol, tert-butanol, diisopropylmethanol, cyclopentanol,cyclohexanol, benzyl alcohol, diphenylmethanol, or triphenylmethanol.This reaction can be achieved by several hours reflux in a solvent suchas benzene, dichloromethane, chloroform, or ethyl acetate in thepresence of a base such as triethylamine, 4-dimethylaminopyridine, or4-pyrrolidinoyridine, as required.

STEP 5

In this step, the ester of compound 5 is reduced to an aldehyde, whichis allowed to react with an ylide to generate a double bond. Thereduction of the ester is carried out in a solvent such as ether,tetrahydrofuran, or toluene in the presence of a reducing agent such asdiisobutylaluminum hydride, lithium trimethoxyaluminum hydride, lithiumtri-tert-butoxylaluminum hydride; the reaction is completed in severaltens of minutes to several hours under cooling. This aldehyde is readilycyclized to form a hemiacetal which is in equilibrium with the aldehyde.The reaction of the aldehyde with an ylide (reaction for double bondformation) is processed in accordance with the conventional Wittigreaction. The ylide used in the reaction is synthesized in the presenceof a base from triphenylphosphine on reaction with a halide of alkanoicor alkenoic acid possessing a carboxyl group at the ω-position. As thehalide of C₄ -C₅ alkanoic or alkenoic acids used for this process,4-bromobutanoic acid, 4-bromo-2-butenoic acid, 4-bromo-3-butenoic acid,5-bromopentanoic acid, 5-bromo-2-pentenoic acid, 5-bromo-3-pentenoicacid, 5-bromo-4-pentenoic acid, 6-bromohexanoic acid, 6-bromo-2-hexenoicacid, 6-bromo-3-hexenoic acid, 6-bromo-4-hexenoic acid,6-bromo-5-hexenoic acid and so on are available. As for the base, sodiumhydride, sodium dimsyl, potassium dimsyl, n-butyl lithium, potassiumtert-butoxide, or lithium diisopropylamide are cited. This reaction isconducted in a solvent such as ether, tetrahydrofuran, n-hexane, ordimethylsulfoxide, and can be achieved in several hours under cooling orat room temperature. At this stage, the carboxy group is esterified inorder to protect it in the succeeding reactions. The esterification maybe done by one of the following conventional methods: a method in whichthe carboxylic acid is allowed to react with an alcohol such asmethanol, ethanol, n-propanol, isopropanol, butanol, or pentanol in thepresence of a catalyst, as required, such as dried hydrogen chloride, orconcentrated sulfuric acid; a method in which the carboxylic acid istransformed into an acid chloride which is allowed to react with analcohol as cited above in the presence of a base such as metallicmagnesium, N,N-dimethylaniline, pyridine, or sodium hydroxide; a methodemploying diazomethane; and a method employing dimethyl sulfate anddiazabicyclononene or diazabicycloundecene.

STEP 6

In this step, the amino-protecting group of the compound II a(2R*-c) isremoved and the resulting amine is allowed to react with a substitutedsulfonic acid halide to give the sulfonamide derivative I a-a(2R*-c).Removal of the protecting group is achieved by a conventional methodwith trifluoroacetic acid and anisole under warming for several hours.The product can be used in the form of trifluoroacetate salt in thesubsequent process, but, according as necessity, it may be convertedinto the free amine by treatment with an adequate alkali such as sodiumcarbonate and sodium hydrogencarbonate. The reaction to give thesulfonamide derivatives is completed in several tens of minutes in asolvent such as dichloromethane, chloroform, ether, tetrahydrofuran, orbenzene in the presence of a basic substance such as pyridine ortriethylamine at room temperature, using a sulfonic acid halide having adesired substituent such as methanesulfonyl chloride, ethanesulfonylchloride, propanesulfonyl chloride, butanesulfonyl chloride,pentanesulfonyl chloride, hexanesulfonyl chloride, heptanesulfonylchloride, octanesulfonyl chloride, benzenesulfonyl chloride,methoxybenzenesulfonyl chloride, nitrobenzenesulfoyl chloride,hydroxybenzenesulfonyl chloride, toluenesulfonyl chloride,ethylbenzenesulfonyl chloride, aminobenzenesulfonyl chloride,acetylaminobenzenesulfonyl chloride, or dimethylaminobenzenesulfonylchloride. In this process, the sulfonamide derivative is produced in acis form.

STEP 7

In this step the ester I a-a(2R*-c) is hydrolyzed into the carboxylicacid I a-b(2R*-c). The hydrolysis is carried out by a conventionalprocedure. Hydrochloric acid, sulfuric acid, sodium hydroxide, potassiumhydroxide, or barium hydroxide is used as a catalyst. Solvents such asmethanol-water, ethanol-water, acetone-water, or acetonitrile-water areused. In this process the cis-form of free carboxylic acid is obtained.According to necessity, the carboxylic acid can be converted into thecis-form carboxylate I a-c(2R*-c) by conventionally processing it withan alkali such as sodium methoxide, sodium hydroxide, potassiumhydroxide, calcium hydroxide, ammonium hydroxide, methylmorpholine,pyridine, triethylamine, or glycine.

STEP 8

In this step, the carboxyl group of the compound 4 is esterified forprotection in the succeeding reactions. The compound 4 is allowed toreact with benzyl alcohol, diphenyldiazomethane, triphenylmethylchloride, phthalimidomethyl chloride, or 4-picolyl chloride, along withhydrochloric acid, sulfuric acid, or triethylamine as required. Thisreaction may be conducted in a solvent such as methanol, ethanol,dichloromethane, chloroform, ether, tetrahydrofuran, ethyl acetate, ordimethylformamide, and is completed after several tens of minutes toseveral hours of warming.

STEP 9

In this step, the cis-form compound 10 is isomerized into thethermodynamically stable trans-form isomer 11. This reaction is achievedin a solvent such as toluene, xylene, dimethylsulfoxide, ordimethylformamide by heating for several days. According as necessity, acatalytic amount of basic substance such as diazabicyclononene,diazabicycloundecene, pyrrolidine-acetate, piperidine-acetate, ortriethylamine may be added.

STEP 10

In this step, the protecting group of the 3-carboxy group of thecompound 11 is selectively removed to give the compound 12. Thisreaction can be achieved in several minutes to several hours undercooling or at room temperature with trifluoroacetic acid, boronfluoride, and so forth. As a solvent, dichloromethane, PG,45 chloroform,ether, tetrahydrofuran, and anisole are recommended. This process canalso be achieved by catalytic reduction using palladium carbon and soon.

STEP 11

In this step, the carboxylic acid 12 is converted to the urethane 13through an intermediate isocyanate. The reaction of this step may followthe procedure of Step 4.

STEP 12

In this step, the compound 13 is hydrolyzed into a primary amine, whichis allowed to react with a substituted sulfonic acid halide in thepresence of a basic catalyst to give the sulfonamide derivative 14. Thereaction of this step may follow the procedure of Step 6.

STEP 13

In this step, the ester 14 is reduced to an aldehyde, which is furtherallowed to react with an ylide to generate a double bond. The reactionof this step may follow the procedure of Step 5. In this process thetrans-form of sulfonamide derivative I a-a(2R*-t) is produced.

STEP 14

In this step, the carboxylate ester I a-a(2R*-t) is hydrolyzed into thefree carboxylic acid I a-b(2R*-t), which may be processed further withan adequate base to give the carboxylate salt I a-c(2R*-t). In thisprocess the free trans-form carboxylic acids and their salts areproduced. In this process the reaction is achieved according to theprocedure of Step 7. ##STR21##

PROCESS I-6 STEP 1

In this step, the amine 1 is allowed to react with a substitutedsulfonic acid halide in the presence of a base to give the sulfonamidederivatives 2. The reaction to give the sulfonamide derivatives iscompleted in several tens of minutes in a solvent such as chlorinatedhydrocarbon, e.g. chloroform or dichloromethane, ether, e.g. ethyl etheror tetrahydrofuran, or aromatic solvent, e.g. benzene, in the presenceof a basic substance such as pyridine, triethylamine, potassiumhydroxide or sodium hydroxide at room temperature, using a sulfonic acidhalide having a desired substituent such as methanesulfonyl chloride,ethanesulfonyl chloride, propanesulfonyl chloride, butanesulfonylchloride, pentanesulfonyl chloride, hexanesulfonyl chloride,heptanesulfonyl chloride, octanesulfonyl chloride, benzenesulfonylchloride, methoxybenzenesulfonyl chloride, nitrobenzenesulfonylchloride, hydroxybenzenesulfonyl chloride, toluenesulfonyl chloride,ethylbenzenesulfonyl chloride, aminobenzenesulfonyl chloride,acetylaminobenzenesulfonyl chloride, or dimethylaminobenzenesulfonylchloride.

STEP 2

In this step, the carboxylic acid 2 is reduced to an alcohol 3. Thisstep may be carried out with a reducing agent, for example, diborane ormetal hydride such as sodium borohydride, lithium aluminum hydride,lithium trimethoxy aluminum hydride, or sodiumbis(2-methoxyethoxy)aluminum hydride, in a solvent alcohol such asmethanol or ethanol, ether such as ethyl ether or tetrahydrofuran, oraromatic solvent such as benzene under cooling or at room temperaturefor a period of several tens of minutes to several hours.

STEP 3

In this step, the alcohol 3 is oxidized into the aldehyde 4. Theoxidation may be carried out with chromates such as Jones' reagent,Collins' reagent, pyridinium chlorochromate, pyridinium dichromate in asolvent such as chlorinated hydrocarbon, e.g. chloroform ordichloromethane, ether, e.g. ethyl ether or tetrahydrofuran, or acetoneor benzene under cooling or at room temperature for several hours.

STEP 4

In this step, the carbon number of the side chain of 2-position in thecompound 4 is increased to give the compound 5. This reaction may becarried out in accordance with a conventional manner of the Wittigreaction. As a phosphonium salt, such asmethoxymethyltriphenylphosphonium chloride ormethoxymethyltriphenylphosphonium bromide may be used. As a base, sodiumhydride, n-butyl lithium, sodium dimsyl or potassium dimsyl may be use.The reaction is completed in a solvent such as an ether, e.g. ethylether or tetrahydrofuran, or n-hexane, dimethylsulfoxide under coolingor at room temperature within a period of several tens of minutes toseveral hours.

STEP 5

In this step, the enol ether 5 is hydrolyzed with an acid to give thehemiacetal, equivalent to the aldehyde, which is allowed to react withan ylide to give the compounds of the present invention. In an aciddecomposition reaction, formic acid, acetic acid, hydrochloric acid,sulfuric acid, perchloric acid or the like may be used as an acid. As asolvent, aqueous alcohol such as methanol or ethanol, ether such asethyl ether or tetrahydrofuran, or acetonitrile, dioxane or water may beused. The reaction of the aldehyde with an ylide (reaction for doublebond formation) is carried out in accordance with a conventional mannerof the Wittig reaction. The phosphonium salt used in the reaction isprepared from triphenylphosphine on the reaction with a halide ofalkanoic or alkenoic acid possessing a carboxy group at the ω-positionin the presence of a base. As the halide of C₄ -C₅ alkanoic or alkenoicacids used for this process, 4-bromobutanoic acid, 4-bromo-2-butenoicacid, 4-bromo-3-butenoic acid, 5-bromopentanoic acid,5-bromo-2-pentenoic acid, 5-bromo-3-pentenoic acid, 5-bromo-4-pentenoicacid, 6-bromohexanoic acid, 6-bromo-2-hexenoic acid, 6-bromo-3-hexenoicacid, 6-bromo-4-hexenoic acid, 6-bromo-5-hexenoic acid and so on areavailable. As for the base, sodium hydride, sodium dimsyl, potassiumdimsyl, n-butyl lithium, potassium tert-butoxide, or lithiumdiisopropylamine are cited. This reaction is conducted in a solvent suchas ether, e.g. ethyl ether or tetrahydrofuran, or n-hexane, toluene ordimethylsulfoxide, under cooling or at room temperature for severalhours. When R₁ denotes a hydrogen, the compound may be esterified, ifnecessary. The esterification may be done by one of the followingconventional methods: a method for the reaction of the carboxylic acidwith an alcohol such as methanol, ethanol, n-propanol, isopropanol,butanol, or pentanol in the presence of a catalyst, as required, such asdry hydrogen chloride, or concentrated sulfuric acid; a method for thetransformation of the carboxylic acid into an acid chloride andsubsequent reaction with an alcohol as cited above in the presence of abase such as metallic magnesium, N,N-dimethylaniline, pyridine, orsodium hydroxide; a method employing diazomethane; and a methodemploying dimethylsulfate acid and diazabicyclononene ordiazabicycloundecene. In the esterification, the carboxylate ester Ia-a(2S*-c) of the present invention may be prepared. The free carboxylicacid I a-b(2S*-c) of the present invention may be prepared byhydrolyzing the carboxylate ester I a-a(2S*-c). The hydrolysis iscarried out by a conventional procedure. Hydrochloric acid, sulfuricacid, sodium hydroxide, potassium hydroxide, or barium hydroxide is usedas a catalyst. A solvent such as aqueous methanol, ethanol, acetone, oracetonitrile is used. According to necessity, the carboxylic acid Ia-b(2S*-c) can be converted into the carboxylate salt I a-c(2S*-c) ofthe present invention represented by the general formula (I) in aconventional manner on treatment with a base such as sodium methoxide,sodium hydroxide, potassium hydroxide, calcium hydroxide, ammoniumhydroxide, methylmorpholine, pyridine, dicyclohexylamine, triethylamine,glycine, valine, or alanine. ##STR22##

PROCESS I-7 STEP 1

In this step, the acid anhydride 1 is esterified by alcoholysis to givethe compound 2. The esterification reaction is carried out by refluxingthe acid anhydride in an alcohol such as methanol, ethanol, propanol,isopropanol, butanol or tert-butanol, or phenol for a period of severaltens of minutes to several hours.

STEP 2

In this step, 2-carboxy group of the compound 2 is converted into theazide and then into the isocyanate, which is then allowed to react withan alcohol to give the urethane 3. This process can be achieved by theCurtius rearrangement; that is, the azide compound is obtained by thereaction of either of the acid chloride or acid anhydride with sodiumazide; the acid chloride is prepared by treating the carboxy group withthionyl chloride, phosphoryl chloride, or phosphorus pentachloride; theacid anhydride is obtained by the reaction of the carboxy group withethyl chloroformate or isobutoxycarbonyl chloride in the presence of abase catalyst such as triethylamine or 4-dimethylaminopyridine in asolvent such as acetone, dimethylformamide, dimethylsulfoxide, ethylacetate, or tetrahydrofuran under cooling for a period of several tensof minutes to several hours. The isocyanate can be prepared by refluxingthe azide compound in benzene, toluene, or diphenyl ether for a periodof several tens of minutes to several hours. The alcohol used in thereaction with the isocyanate includes those giving an urethane which canreadily be converted into the desired primary amine, for example,isobutanol, tert-butanol, diisopropylmethanol, cyclopentanol,cyclohexanol, benzyl alcohol, diphenylmethanol, or triphenylmethanol.This reaction can be carried out under refluxing for several hours in asolvent such as benzene, dichloromethane, chloroform, or ethyl acetatein the presence of a base such as triethylamine,4-dimethylaminopyridine, or 4-pyrrolidinopyridine, as required.

STEP 3

In this step, the ester of compound 3 is reduced to an aldehyde 4. Thereduction is carried out with a reducing agent such as sodiumbis(2-methoxyethoxy)aluminum hydride, diisobutyl aluminum hydride,lithium trimethoxyaluminum hydride, lithium tri-tert-butoxyaluminumhydride in an ethereal solvent such as ethyl ether or tetrahydrofuran,or aromatic solvent such as benzene or toluene under cooling or at roomtemperature for a period of several tens of minutes to several hours. Ifnecessary, in order to control the reducing power, a cyclic amine suchas pyrrolidine, N-ethylpiperidine may be added to the reaction medium.In this step, further reduction of the aldehyde 4 sometimes affords thealcohol 5.

STEP 4

In this step, the alcohol 5 is oxidized into aldehyde 4. The oxidationmay be carried out with chromates such as Jones' reagent, Collins'reagent, pyridinium chlorochromate, pyridinium dichromate in a solventsuch as dimethylformamide, dimethylsulfoxide, chlorinated hydrocarbonessuch as chloroform or acetone under cooling or at room temperature forseveral hours.

STEP 5

In this step, the aldehyde 4 is allowed to react with an ylide to givean enol ether 6. This reaction may be carried out in accordance with aconventional manner for the Wittig reaction. The ylide prepared fromtriphenylphosphine and chloromethyl ether or bromomethyl ether in thepresence of a base such as sodium hydride, n-butyl lithium, potassiumtert-butoxide, lithium diisopropylamine, sodium dimsyl or potassiumdimsyl may be used. The reaction is completed in a solvent such as anether, e.g. ethyl ether or tetrahydrofuran, or n-hexane, toluene,dimethylsulfoxide under cooling or at room temperature within severalhours.

STEP 6

In this step, the enol ether 6 is hydrolyzed with an acid to give thealdehyde 7. As an acid, formic acid, acetic acid, hydrochloric acid,sulfuric acid, perchloric acid or the like may be used. As a solvent,aqueous alcohols such as methanol or ethanol, ethers such as ethyl etheror tetrahydrofuran, or acetonitrile may be used. The reaction may becarried out at room temperature or under warming for a period of severaltens of minutes to several hours.

STEP 7

In this step, the aldehyde 7 is allowed to react with an ylide to givethe starting compound II b of the present invention. The reaction of thealdehyde with an ylide (reaction for double bond formation) is carriedout in accordance with a conventional manner for the Wittig reaction.The ylide used in the reaction is prepared from triphenylphosphine onthe reaction with a halide of alkanoic or alkenoic acid possessing acarboxy group at the ω-position in the presence of a base. As the halideof C₄ -C₆ alkanoic or alkenoic acids used for this process,4-bromobutanoic acid, 4-bromo-2-butenoic acid, 4-bromo-3-butenoic acid,5-bromopentanoic acid, 5-bromo-2-pentenoic acid, 5-bromo-3-pentenoicacid, 5-bromo-4-pentenoic acid, 6-bromohexanoic acid, 6-bromo-2-hexenoicacid, 6-bromo-3-hexenoic acid, 6-bromo-4-hexenoic acid,6-bromo-5-hexenoic acid and so on are available. As for the base, sodiumhydride, sodium dimsyl, potassium dimsyl, n-butyl lithium, potassiumtert-butoxide, or lithium diisopropylamine are cited. This reaction isconducted in a solvent such as ether, tetrahydrofuran, n-hexane, ordimethylsulfoxide, under cooling or at room temperature within severalhours. In this reaction, the product is obtained as the Z-isomer aloneor as a mixture of the Z-isomer and E-isomer according to the reactioncondition employed. At this stage, the carboxy group is esterified inorder to protect it in the succeeding reactions. The esterification maybe done by one of the following conventional methods: a method for thereaction of the carboxylic acid with an alcohol such as methanol,ethanol, n-propanol, isopropanol, butanol, or pentanol in the presenceof a catalyst, as required, such as dry hydrogen chloride orconcentrated sulfuric acid; a method for the transformation of thecarboxylic acid into an acid chloride and subsequent reaction with analcohol as exemplified above in the presence of a base such as metallicmagnesium, N,N-dimethylaniline, pyridine, or sodium hydroxide; a methodemploying diazomethane; and a method employing dimethylsulfate anddiazabicyclononene or diazabicycloundecene.

STEP 8

In this step, the starting compound II b of the present invention isallowed to react in accordance with the manner of the followingprocedure to give the compounds of the present invention.

In this step, compound II b is allowed to react with a substitutedsulfonyl chloride in the presence of a base to give sulfonamidederivatives I b of the present invention. The amino-protecting group maybe removed by a conventional method, for example, hydrolysis with anacid such as hydrochloric acid or sulfuric acid, or a base such assodium hydroxide, potassium hydroxide or barium hydroxide, aciddecomposition with trifluoroacetic acid, or hydrogenolysis. The productcan be used in the form of ammonium salt in the subsequent process, but,according as necessity, it may be converted into the free amine bytreatment with an adequate alkali such as sodium carbonate or sodiumhydrogencarbonate. The carboxy group may be esterified in order toprotect it in the succeeding reactions. The esterification may beeffected by one of the following conventional methods: a method forreacting the carboxylic acid with an alcohol such as methanol, ethanol,n-propanol, isopropanol, butanol, or pentanol in the presence of acatalyst, as required, such as dry hydrogen chloride, or concentratedsulfuric acid; a method for transformation of the carboxylic acid intoan acid chloride and subsequent reaction with an alcohol as cited abovein the presence of a base such as metallic magnesium,N,N-dimethylaniline, pyridine, or sodium hydroxide; a method employingdiazomethane; and a method employing dimethyl sulfate anddiazabicyclononene or diazabicycloundecene. The reaction to give thesulfonamide derivatives is completed in several tens of minutes in asolvent such as dichloromethane, chloroform, ether, tetrahydrofuran, orbenzene in the presence of a basic substance such as pyridine ortriethylamine at room temperature, using a sulfonic acid halide having adesired substituent such as methanesulfonyl chloride, ethanesulfonylchloride, propanesulfonyl chloride, butanesulfonyl chloride,pentanesulfonyl chloride, hexanesulfonyl chloride, heptanesulfonylchloride, octanesulfonyl chloride, benzenesulfonyl chloride,methoxybenzenesulfonyl chloride, nitrobenzenesulfoyl chloride,hydroxybenzenesulfonyl chloride, toluenesulfonyl chloride,ethylbenzenesulfonyl chloride, aminobenzenesulfonyl chloride,acetylaminobenzenesulfonyl chloride, or dimethylaminobenzenesulfonylchloride. In this step, the carboxylate ester I b-a of the presentinvention can be prepared. Further, the carboxylate ester I b-a may beconverted into free carboxylic acid I b-b by hydrolysis in accordance toa conventional procedure. Hydrochloric acid, sulfuric acid, sodiumhydroxide, potassium hydroxide, or barium hydroxide is used as acatalyst. Solvent such as aqueous methanol, aqueous ethanol, aqueousacetone or aqueous acetonitrile is used. According as necessity, thecarboxylic acid I b-b can be converted into the carboxylate I b-c in aconventional manner on treatment with an alkali such as sodiummethoxide, sodium hydroxide, potassium hydroxide, calcium hydroxide,ammonium hydroxide, methylmorpholine, pyridine, triethylamine, glycine,valine or alanine.

In this step, the carboxylate ester I b-a(2S*-t) of the2S*-trans-sulfonamide derivatives I b(2S*-t); the free carboxylic acid Ib-b(2S*-t) and the carboxylate salt I b-c(2S*-t), and the carboxylateester I b-a(2R*-c) of 2R*-cis-sulfonamide derivatives I b(2R*-c); thefree carboxylic acid I b-b(2R*-c) and the carboxylate salt I b-c(2R*-c)are prepared. ##STR23##

PROCESS I-8 STEP 1

In this step, the lactone 8 is cleaved with cyano-formation to give thecarboxylic acid 9. This reaction may be carried out with metal cyanidesuch as potassium cyanide, sodium cyanide or copper cyanide as acyanating agent in a solvent such as dimethylsulfoxide ordimethylformamide under heating for several hours.

STEP 2

In this step, the carboxy group of the compound 9 is esterified in orderto promote the isomerization at the following step. The esterificationmay be carried out in accordance with a usual method for esterificationof carboxy group, that is, for example, a method using alcohol such asmethanol, ethanol, propanol, isopropanol or benzyl alcohol, a methodusing diazomethane or diphenyldiazomethane, or a method usingtriphenylmethyl chloride, phthalimidomethyl chloride or 4-picolylchloride. An acid such as hydrochloric acid, sulfuric acid,p-toluenesulfonic acid or a base such as sodium hydroxide, potassiumhydroxide, barium hydroxide or triethylamine may be used as a catalyst,as required. The reaction may be carried out in a solvent such asalcohols, methanol or ethanol, ethers, ethyl ether or chlorinatedhydrocarbon, e.g. dichloromethane or chloroform, ethyl acetate, ordimethylformamide at room temperature or under warming for a period ofseveral tens of minutes to several hours.

STEP 3

In this step, the cis-form compound 10 is isomerized to thethermodynamically stable trans-form isomer 11. The reaction may becarried out in a solvent such as alcohol, e.g. methanol or ethanol,ether e.g. ethyl ether or tetrahydrofuran, at room temperature forseveral hours. If necessary, a base such as sodium hydroxide, potassiumhydroxide or barium hydroxide may be added. In the case where a base isadded, the ester is hydrolyzed to give the carboxylic acid.

STEP 4

In this step, 3-carboxy group of the compound 11 is converted into theazide, which is then rearranged into the isocyanate, which is thenallowed to react with an alcohol to yield the urethane 12. This step canbe achieved by the Curtius rearrangement and carried out in accordancewith the manner of Process I-7, Step 2.

STEP 5

In this step, the cyano group of the compound 12 is reduced to give thealdehyde 13. In this step, diisobutylaluminum hydride is used as areducing agent. The reaction is completed in a solvent such as an ether,e.g. ethyl ether or tetrahydrofuran, aromatic solvent, e.g. toluene, orhexane under cooling within several hours.

STEP 6

In this step, the aldehyde 13 is allowed to react with an ylide to givethe starting compound II b(2R*-t) of the present invention. The reactionof the aldehyde with an ylide (reaction for double bond formation) isachieved in accordance with a conventional manner for the Wittigreaction. This step may be carried out in accordance with the manner ofProcess I-7, Step 7.

STEP 7

In this step, the starting compound II b(2R*-t) is allowed to react inaccordance with the manner of Process I-7, Step 8 to give the compoundsof the present invention. In this step, the carboxylate ester Ib-a(2R*-t) of the 2R*-trans-sulfonamide derivatives I b(2R*-t), the freecarboxylic acid I b-b(2R*-t) and the carboxylate salt I b-c(2R*-t) areprepared. ##STR24##

PROCESS I-9 STEP 1

In this step, the hydroxy group of the compound 1 is oxidized into thecarboxy group. The oxidation may be carried out with chromates such asJones' reagent, Collins' reagent, pyridinium chlorochromate, pyridiniumdichromate in a solvent such as dimethylformamide, dimethylsulfoxide,chlorinated hydrocarbons such as chloroform or acetone under cooling orat room temperature for several hours.

STEP 2

In this step, the carboxy group of the compound 2 is converted into theazide, which is then allowed to react with an alcohol to give theurethane II b(2S*-c). This step is carried out in accordance with themanner of Process I-7, Step 2.

STEP 3

In this step, the compound II b(2S*-c) is allowed to react in accordancewith the manner of Process I-7, Step 8 to give the compound of thepresent invention. In this step, the carboxylate ester I b-a(2S*-c) ofthe 2S-cis-sulfonamide derivatives; the free carboxylic acid Ib-b(2S*-c); or the carboxylate salt I b-b(2S*-c) is prepared. ##STR25##

PROCESS II STEP 1

In this step, an allyl group is introduced into the 2-position of thecompound 1. An allylating agent such as allyl halide, e.g., allylchloride, allyl bromide or allyl iodide, or allyl sulfonate is used inthis step. As a catalyst, such a relatively strong base as n-butyllithium, sodium amide, potassium tert-butoxide, sodium hydride, orlithium diisopropylamide may be used. As a solvent, ether, such asdiethyl ether, tetrahydrofuran, glyme, or diglyme is exemplified. Thereaction is achieved at a temperature of -78° C. to 25° C. within aperiod of several minutes to several hours.

STEP 2

In this step, the oxime 2 is reduced to the amine 3. As a reducingagent, lithium aluminium hydride, zinc or stannous chloride isexemplified. As a solvent, alcohol such as methanol or ethanol, or ethersuch as diethyl ether or tetrahydrofuran is exemplified. This step alsoachieved by catalytic hydrogenation with a catalyst such as platinum orpalladium, or reduction with metal sodium in an alcohol solvent.

In this step, a mixture of two stereoisomers of which the 3-side chainhas α and β configurations is prepared.

STEP 3

In this step, the amine 3 is converted into the sulfonamide derivatives4. This step may be carried out in accordance with the manner of ProcessI-6, Step 1.

STEP 4

In this step, the double bond of allyl group of the compound 4 isoxidized into the epoxide 5. As an oxidizing agent, a combination ofhydrogen peroxide and transition metal, or peroxy acid or peroxy acidester such as performic acid, peracetic acid, perbenzoic acid,monoperphthalic acid, monopermaleic acid, pertrifluoroacetic acid,m-chloroperbenzoic acid, or p-nitroperbenzoic acid may be used. As asolvent, ether such as diethyl ether or tetrahydrofuran, alcohol suchas, methanol or ethanol, or chlorinated hydrocarbon such asdichloromethane or chloroform may be used. The reaction is carried outat a temperature of 0° C. to room temperature for a period of severalminutes to several hours.

STEP 5

In this step, the epoxide 5 is converted into the aldehyde II e losingone carbon through the hydration and the subsequent oxidative cleavageof the resulting glycol. As an oxidizing agent which also serves as ahydrating catalyst, periodic acid or orthoperiodic acid may be used. Itis desirable to use a solvent which is miscible with water, such asether, e.g., diethyl ether, tetrahydrofuran, dioxane, alcohol, e.g.,methanol, ethanol. The reaction is carried out at room temperature for aperiod of several tens of minutes to several hours.

In this step, the aldehyde II e, the starting compounds towards thecompound I e of the present invention, can be prepared.

STEP 6

In this step, the compound II e is allowed to react in accordance withthe manner of Process I-7, Step 7 to give the compound of the presentinvention.

In this reaction, the free carboxylic acid I e-b can be prepared. Ifnecessary, the carboxylic acid I e-b may be esterified. Theesterification may be carried out in accordance to the method describedin Process I-7, Step 8. In this esterification, the carboxylate ester Ie-a of the present invention can be prepared. Moreover, the freecarboxylic acid I e-b may be converted into the carboxylate salt I e-cby treating in accordance to Process I-7, Step 8. ##STR26##

PROCESS III-1 STEP 1

In this step, a methylene group is introduced between the C₄ -C₅ carbonatoms of the compound 1a(2R*). As a methylene donor agent, theSimmons-Smith agent or its analog prepared from methylene iodide andzinc-copper couple, zinc-silver couple, diethylzinc or ethylzinc iodide,or diazomethane and zinc halide, respectively, is used. As a solvent,ethers such as diethyl ether, tetrahydrofuran, glyme or diglyme may beused. The reaction is completed at room temperature or under heatingwithin several hours. In this step, the methylene group is introduced tothe same side as that of the 3-hydroxy.

STEP 2

In this step, the hydroxy of hydroxyethyl of the compound 2b isprotected. As compounds forming a protecting group, methoxymethylchloride, benzyloxymethyl chloride, benzyl chloride, triphenylmethylchloride, trimethylsilyl chloride, bistrimethylsilylacetamide,dimethyl-tert-butylsilyl chloride or the like may be exemplified. Thereaction may be carried out in a conventional manner in the presence ofa base such as triethylamine or pyridine, if necessary, with a catalystsuch as dimethylaminopyridine. As a solvent, ethers such as diethylether or tetrahydrofuran, or chlorinated hydrocarbons such asdichloromethane or chloroform may be exemplified.

This step may be carried out prior to Step 1.

STEP 3

In this step, the 3-hydroxy group of the compound 2a(3R*-β) is oxidized.As an oxidizing agent, chromate-type agents such as Jones' reagent,Collins' reagent, pyridinium chlorochromate or pyridinium dichromate, ordimethylsulfoxide combined with sulfur trioxide, trifluoroaceticanhydride, methanesulfonic anhydride, thionyl chloride or oxalylchloride or the like may be used. In a case where dimethylsulfoxide isused as an oxidizing agent, a tertiary amine such as triethylamine orpyridine may be used as a decomposing agent. As a solvent, according tothe property of the agent, a chlorinated hydrocarbon such as chloroformor dichloromethane, ether such as diethyl ether, tetrahydrofuran, ordimethylsulfoxide may be used. The reaction may be carried out undercooling or at room temperature within several hours.

STEP 4

In this step, the 3-ketone of the compound 4(β) is converted into theoxime. The oxime formation is carried out with hydroxylaminehydrochloride or sulfate in the presence of a base such as sodiumhydroxide, potassium hydroxide or sodium carbonate. As a solvent, analcohol such as methanol or ethanol may be exemplified.

STEP 5

In this step, the oxime 5 is reduced to the amine 7. This step may beachieved by reducing the oxime 5 into the imine, which is then convertedinto the amine 7. As a reducing agent for reducing the oxime 5 to theimine, a combination of disulfide such as diphenyldisulfide ordibenzyldisulfide with phosphines such as n-tributhylphosphine,trimethoxyphosphine, triethoxyphosphine, or triphenylphosphine may beused. As a solvent, an ether such as diethyl ether or tetrahydrofuranmay be used. The reaction may be carried out under cooling for severalhours. As a reducing agent for reducing the imine to the amine 7,lithium aluminum hydride, sodium borohydride, sodium cyanoborohydride orthe like may be exemplified. As a solvent, an alcohol such as methanolor ethanol, or ether such as diethyl ether or tetrahydrofuran may beexemplified. In this step, the 3-side chain can be located in either ofα or β configuration dependent on the property of the agent used.

STEP 6

In this step, the amine 7 is converted into the sulfonamide derivatives8. The reaction to the sulfonamide derivatives is completed in severaltens of minutes in a solvent such as chlorinated hydrocarbon, e.g.dichoromethane or chloroform, ether, e.g. ethyl ether ortetrahydrofuran, or aromatic solvent, e.g. benzene, in the presence of abasic substance such as pyridine or triethylamine at room temperature,using a sulfonic acid halide having a desired substituent such asmethanesulfonyl chloride, ethanesulfonyl chloride, propanesulfonylchloride, butanesulfonyl chloride, pentanesulfonyl chloride,hexanesulfonyl chloride, heptanesulfonyl chloride, octanesulfonylchloride, benzenesulfonyl chloride, methoxybenzenesulfonyl chloride,nitrobenzenesulfonyl chloride, hydroxybenzenesulfonyl chloride,toluenesulfonyl chloride, ethylbenzenesulfonyl chloride,aminobenzenesulfonyl chloride, acetylaminobenzenesulfonyl chloride, ordimethylaminobenzenesulfonyl chloride. If necessary,4-dimethylaminopyridine may be used as a catalyst.

STEP 7

In this step, the hydroxy-protecting group of the compound 8 is removed.The reaction condition for removal of the protecting group is variableaccording to the group. In a case of lower alkyl which has a substituentsuch as alkoxymethoxy, aralkyloxymethoxy, or aralkyloxy, the reaction iscarried out by treating the compound 8 with an acid, for example,organic acid such as formic acid, acetic acid, propanic acid, butyricacid, oxalic acid or malonic acid, or mineral acid such as hydrochloricacid, hydrobromic acid or sulfuric acid. In a case of aralkyloxy, thereaction may also be achieved by catalytic hydrogenation. For thereaction to proceed smoothly, a solvent may be used. As a solvent,water, alcohol such as methanol or ethanol, or ether such as diethylether, tetrahydrofuran or dioxane may be used singly or as a mixture.The reaction may be achieved at room temperature or under heating for aperiod of several hours to several tens of hours. In the case where theprotecting group is trilower alkylsilyl, the reaction is easily achievedon the treatment with triethylammonium fluoride in a nonaqueous solvent,or with an acid or base in an aqueous solvent. An acid used in thereaction includes is hydrogen fluoride or those exemplified before, andas a base, hydroxide such as sodium hydroxide, potassium hydroxide orcalcium hydroxide, or carbonate such as sodium carbonate or potassiumcarbonate may be exemplified. As a solvent, aqueous ether such asdiethyl ether, tetrahydrofuran or dioxane, or aqueous alcohol such asmethanol or ethanol may be used. The reaction may be carried out in aconventional manner.

In addition, depending on the reaction conditions, the ester compoundmay be obtained, which may be hydrolyzed in the presence of a base, ifnecessary. As a base, a hydroxide such as sodium hydroxide, potassiumhydroxide or calcium hydroxide, or carbonate such as sodium carbonate orpotassium carbonate may be exemplified. As a solvent, an alcohol such asmethanol or ethanol, ether such as diethyl ether or tetrahydrofuran, ordimethylsulfoxide may be used singly or in a mixture. The reaction maybe achieved at room temperature or under heating within several hours.

STEP 8

In this step, the hydroxy compound 9 is oxidized into the aldehyde II f.This step may be carried out in accordance with the manner of Step 3.The aldehyde prepared in this step is in equilibrium with the cyclichemiacetal II f' when it is in a cis form. The prepared aldehyde II f inthis step, included in the starting compounds of the present invention,has the methylene which is attached to the same side as that of the2-side chain.

The compound of which the methylene is located in the opposite side tothe 2-side chain is prepared as follows. First, the hydroxy of thehydroxyethyl group of the starting compound 1a(2R*) is protected inaccordance with the manner of Step 2 to give the compound 1b(2R*). Theinversion of the 2-hydroxy gives the compound 1b(2S*), which may be usedas a starting material.

The inversion reaction may be achieved by reacting the compound 1b(2R*)with the carboxylic acid compound in the presence of, for example, theMitsunobu agent which is a combination of triphenylphosphine withdiethyl azodicarboxylate. As the carboxylic acid compound, an aliphaticcarboxylic acid such as formic acid, acetic acid, propionic acid orpivalic acid, or aromatic carboxylic acid such as benzoic acid orphenylacetic acid may be exemplified. As solvent, aromatic solvents suchas benzene, chlorinated hydrocarbons such as chloroform ordichloromethane, or ethers such as diethyl ether or tetrahydrofuran maybe exemplified. The reaction may be achieved under cooling or at roomtemperature for a period of several tens of minutes to several hours.The inversion reaction may also be carried out with calcium peroxide orcesium acetate. In this case, the hydroxy may be previously mesylated ina conventional method. As a solvent, dimethylsulfoxide,dimethylformamide, dimethoxyethane, diethyl ether or the like may beexemplified. As a solubilizing agent, 18-Crown-6 may be added. In thecase where the hydroxy group has been esterified, the ester may behydrolyzed in the presence of a base. The hydrolysis may be carried outin accordance with the manner of the ester hydrolysis with a base asmentioned in the Step 7.

The succeeding reaction may be carried out in accordance with the mannerof Step 1 and Steps 3 to 8 to give the aldehyde II f as a startingcompound, of which the methylene is located in the same side as that ofthe 2-side chain. The starting compounds of the present invention whichare substituted by methyl, halogen or trifluoromethyl at the 6-positionmay be prepared as follows.

STEP 9

In this step, the 2-hydroxy of the compound 1b(2R*) is acylated to beprotected. As an acylating agent, acetic anhydride, acetyl chloride,pivaloyl chloride, benzoyl chloride or the like may be exemplified. As asolvent, aromatic one such as benzene, toluene or pyridine may be used.As a base, triethylamine or pyridine may be added and, if necessary, asa catalyst, 4-dimethylaminopyridine may be added. The reaction isachieved at room temperature within several hours.

STEP 10

In this step, a substituted methylene is introduced into between the C₁-C₅ carbon atoms of the compound 1(2R*). A halocarbene derived fromchloroform, bromoform, or dibromodifluoromethane on the treatment with abase such as sodium hydroxide, potassium hydroxide, potassium fluorideor n-butyl lithium, or from sodium chlorodifluoroacetate or lithiumchlorodifluoroacetate by heating may be added to the double bond. As asolvent, chlorinated hydrocarbon such as chloroform or dichloromethanemay be exemplified. If necessary, the reaction may be carried out in atwo phase medium between water and a nonaqueous solvent. As a phasetransfer catalyst, triethylbenzylammonium chloride ortriethylbenzylammonium bromide or the like may be used. The compound ofwhich the 6-position is substituted by fluoro, methyl or trifluoromethylis prepared from the above prepared chloro- or bromo-compound by thereaction with potassium fluoride, silver fluoride or antimony fluoride,or with dimethyl copper lithium, dimethylthiocyanate copper lithium ordimethylcyano copper lithium, if necessary, followed by treatment withmethyl iodide, or by the reaction with trifluoromethyl iodide orbistrifluoromethyldiazomethane in the presence of a copper catalyst. Asa solvent, ether such as diethyl ether or tetrahydrofuran, orhexamethylphosphoramide may be used singly or as a mixture.

STEP 11

In this step, the 3-hydroxy-protecting group of the compound 2(3R*-α) isremoved by hydrolysis. The reaction may be carried out in a conventionalmethod. As a solvent, alcohol such as methanol or ethanol, ether such asdiethyl ether or tetrahydrofuran, or water may be used singly or as amixture. If necessary, a base catalyst such as sodium hydroxide orbarium hydroxide may be used.

STEP 12

In this step, the 3-hydroxy of the compound 2a(3R*-α) is oxidized intothe ketone 4(α). This step is carried out in accordance with the mannerof Step 3.

The compound 4(α) prepared in this step is successively treated inaccordance with the manner of Steps 4 to 8 to give the aldehyde II f ofwhich the methylene is located in the opposite side of the 2-side chain.

STEP 13

In this step, the compound 4(α) is converted into the compound 4(β) inthe presence of a base. As a base, a strongly basic substance such asdiazabicyclononene, diazabicycloundesene, triethylamine, or potassiumtert-butoxide is exemplified. As a solvent, dimethylsulfoxide ordimethylformamide, aromatic solvent such as toluene or xylene isexemplified. This step is achieved by carrying out the reaction at roomtemperature or under heating for a period of several hours to severaltens of hours and then adding the reaction mixture to a cold acidicnonaqueous solvent such as formic acid, acetic acid or propionic acid.

The compound 4(β) prepared in this step is converted into the aldehydeII f, of which the methylene is located in the same side as that of the2-side chain, by treating in accordance with the manner of Steps 4 to 8,successively.

STEP 14

In this step, the ketone 4(β) is reduced to the hydroxy compound2a(3R*-β). As a reducing agent, lithium aluminium hydride, lithiumtriethoxyaluminium hydride, lithium tri-tert-butoxyaluminium hydride,sodium borohydride or the like may be used. As a solvent, ether such asdiethyl ether or tetrahydrofuran, alcohol such as methanol or ethanol,or water may be used according to the property of the agent.

STEP 15

In this step, the hydroxy compound 2a(3R*) [2a(3R*-β) or 2a(3R*-α)]prepared in Steps 11 or 14 is converted into the azide. Before carryingout the azide formation reaction, the hydroxy compound 2a(3R*) issulfonated in the presence of triethylamine or pyridine. As asulfonating agent, p-toluenesulfonyl chloride, methanesulfonyl chloride,trifluorosulfonic anhydride or the like is exemplified. As a solvent,chlorinated hydrocarbon such as chloroform or dichloromethane, ethersuch as diethyl ether or tetrahydrofuran, acetone, dimethylformamide,dimethylsulfoxide, or ethyl acetate may be used. The reaction isachieved under cooling within a period of several minutes to severalhours. If necessary, a catalyst such as 4-dimethylaminopyridine may beadded. The azide compound 6 is prepared from the intermediate thusprepared by the reaction with sodium azide or lithium azide in a solventsuch as hexamethylphosphoramide, dimethylformamide, dimethylsulfoxide,or diphenyl ether under heating for a period of several tens of minutesto several hours.

STEP 16

In this step, the azide 6 is reduced to the amine 7(3S*). As a reducingagent, triphenylphosphine, lithium aluminium hydride,triethylamine-hydrogen sulfide, triethylamine-mercaptane, or the like isexemplified. As a solvent, alcohol such as methanol or ethanol, ethersuch as diethyl ether or tetrahydrofuran is exemplified. The reaction isachieved at room temperature or under heating within several hours. Thisstep may also be carried out by catalytic hydrogenation with a catalystsuch as platinum or palladium.

The amine 7(3S*) prepared in this step is allowed to react in accordancewith the manner of Steps 6 to 8 successively to give the aldehyde II f,one of the starting compounds of the present invention, of which the 2-and 3-side chain are in relation of trans each other.

STEP 17

In this process, aldehyde II f is allowed to react with an ylide to givethe compounds I f of the present invention. The reaction of the aldehydewith an ylide (reaction for double bond formation) is carried out inaccordance with a conventional manner of the Wittig reaction. The ylideused in the reaction is synthesized in the presence of a base fromtriphenylphosphine on reaction with a halide of alkanoic or alkenoicacid possessing a carboxyl group at the ω-position. As the halide of C₄-C₅ alkanoic or alkenoic acids used for this process, 4-bromobutanoicacid, 4-bromo-2-butenoic acid, 4-bromo-3-butenoic acid, 5-bromopentanoicacid, 5-bromo-2-pentenoic acid, 5-bromo-3-pentenoic acid,5-bromo-4-pentenoic acid, 6-bromohexanoic acid, 6-bromo-2-hexenoic acid,6-bromo-3-hexenoic acid, 6-bromo-4-hexenoic acid, 6-bromo-5-hexenoicacid and so on are available. As for the base, sodium hydride, sodiumdimsyl, potassium dimsyl, n-butyl lithium, potassium tert-butoxide, orlithium diisopropylamide are cited. This reaction is conducted in asolvent such as ether, tetrahydrofuran, n-hexane, or dimethylsulfoxide,and can be achieved in several hours under cooling or at roomtemperature. In this reaction, the free carboxylic acid I f-a can beprepared. Depending to the reaction condition the Z-form or a mixture ofthe Z-form and E-form is produced. If necessary, the carboxylic acid If-b may be esterified. The esterification may be carried out inaccordance to the method described in Process I-7, Step 8. In thisesterification, the carboxylate ester I f-a of the present invention canbe prepared. Moreover, the free carboxylic acid I f-b may be convertedinto the carboxylate salt I f-c by treating in accordance with ProcessI-7, Step 8. ##STR27##

PROCESS III-2 STEP 1

In this step, the hydroxy group of the compound 1b(2R*) is convertedinto the azide. This step is carried out in accordance with the mannerof Process III-1, Step 15.

STEP 2

In this step, the azide 2 is reduced into the amine 3. This step iscarried out in accordance with the manner of Process III-1, Step 16.

STEP 3

In this step, the amine 3 is converted into the sulfonamide derivatives4. This step is carried out in accordance with the manner of ProcessIII-1, Step 6.

STEP 4

In this step, the hydroxy-protecting group is removed. This step iscarried out in accordance with the manner of Process III-1, Step 7.

STEP 5

In this step, the double bond of the compound 5a is oxidized intoepoxide 6. This step is carried out in accordance with the manner ofProcess I-1, Step 4.

STEP 6

In this step, the hydroxy of the compound 6 is oxidized into thealdehyde II g. This step may be carried out in accordance with themanner of Process III-1, Step 3. The aldehyde prepared in this step isin equilibrium with the cyclic hemiacetal II g'. The aldehyde II gprepared in this step has the 3-side chain which is in relation of cisconfiguration with the 2-side chain.

In addition, this step may be carried out in advance of Step 5.

The aldehyde II g has the 3-side chain which is in relation of transconfiguration with the 2-side chain is prepared as follows. First, the2-hydroxy of the compound 1b(2R*) is inversed in accordance with themethod for the inversion reaction described in Process III-1. Then, thecompound 1b(2S*) may be allowed to react in accordance with the mannerof Process III-2, Steps 1 to 6.

STEP 7

In this step, aldehyde II g-a (or II g-a) is allowed to react with anylide to give the compound I g-a of the present invention. This step maybe carried out in accordance with a manner of Process III-1, Step 17.

In this step, the carboxylate ester I g-aa of the present invention, thefree carboxylic acid I g-ab or the carboxylate salt I g-ac is prepared.

STEP 8

In this step, the epoxide I g-a is converted into epi-sulfide I g-b.This step may be carried out as follows. First, the epoxide I g-a isconverted into α-hydroxy-thiocyanate by treating with thiocyanic acid inan ethereal solvent such as diethyl ether or tetrahydrofuran at roomtemperature for several hours and then the resulting hydroxy group isconverted into a leaving group. Subsequently, the thiocyanate moiety ishydrolyzed with a base such as potassium hydroxide in a mixture such asdiethyl ether/methanol or diethyl ether/ethanol at room temperature orunder heating for a period of several tens of minutes to several hours.As the leaving group used in this step, a substituted sulfonate, e.g.,methanesulfonate, benzenesulfonate, p-toluenesulfonenate or the like isexemplified. The epi-sulfide prepared in this step has a configurationopposite to that of the starting epoxide.

In this step, the free carboxylic acid I g-bb of the present inventionis prepared. The free carboxylic acid I g-bb may be converted into thecarboxylate ester I g-ba or salt I g-bc in accordance with the manner ofProcess I-7, Step 8. ##STR28##

PROCESS IV-1 PROCEDURE-A STEP 1

In this step, the starting compound II h(2S*-t) of the present inventionis allowed to react in accordance with the manner of Process I-7, Step 8to give the compound of the present invention. In this step, thecarboxylate ester I h-a(2S*-t) of the 2S*-trans-sulfonamide derivativesI h(2S*-t); the free carboxylic acid I h-b(2S*-t) and the carboxylatesalt I h-c(2S*-t) can be prepared.

PROCEDURE B STEP 1

In this step, the starting compound III h(2S*-t) of the presentinvention is allowed to react in accordance with the manner of ProcessIII-1, Step 17 to give the compounds of the present invention. In thisstep, the carboxylate ester I h-a(2S*-t) of the 2S*-trans-sulfonamidederivatives I h(2S*-t); the free carboxylic acid I h-b(2S*-t) and thecarboxylate salt I h-c(2S*-t) can be prepared. ##STR29##

PROCESS IV-2 STEP 1

In this step, the 3-hydroxy group of the compound 1 is converted intothe azide. Firstly, a chloride or a sulfonyl compound is prepared as aintermediate. The hydroxy compound 1 is converted into the chloride onthe reaction with thionyl chloride or into the alternative intermediatein the reaction with p-toluenesulfonyl chloride, methanesulfonylchloride or trifluoromethanesulfonic anhydride or the like in a solventsuch as chlorinated hydrocarbon, e.g. chloroform or dichloromethane,ether, e.g. ethyl ether or tetrahydrofuran, acetone, dimethylformamide,dimethylsulfoxide, or ethyl acetate under cooling for a period ofseveral minutes to several hours. The intermediate prepared in such amanner is heated with sodium azide in a solvent such ashexamethylphosphoramide, dimethylformamide, dimethylsulfoxide, ordiphenyl ether for a period of several tens of minutes to several hoursto give the azide compound 2.

STEP 2

In this step, the azide compound 2 is reduced to give the amine 3. Thereaction may be carried out with a metal hydride compound such aslithium aluminium hydride or triphenylphosphine as a reducing agent in asolvent such as ether, e.g. ethyl ether or tetrahydrofuran at roomtemperature or under heating for several hours.

STEP 3

In this step, an amino-protecting group is introduced into the amine 3.The amine may be allowed to react, for example, with trifluoroaceticanhydride, trifluoroacetyl chloride, benzyloxycarbonyl chloride ortriphenylmethyl chloride in the presence of a base such astriethylamine, pyridine or sodium hydrogencarbonate in a solvent such aschlorinated hydrocarbon, e.g. chloroform or dichloromethane or aromaticsolvent, e.g. benzene or toluene. The reaction may be carried out atroom temperature or under heating for a period of several tens ofminutes to several hours.

STEP 4

In this step, the hydroxy-protecting group is removed by acidhydrolysis. The reaction may be carried out in accordance with the usualmethod or hydrolysis using such catalyst as acetic acid, hydrochloricacid, sulfuric acid, or p-toluenesulfonic acid in a solvent such asaqueous alcohol, e.g. methanol or ethanol, or aqueous ether, e.g. ethylether or tetrahydrofuran.

STEP 5

In this step, the alcohol 5 is oxidized into an aldehyde. The reactionmay be achieved by a method using dimethylsulfoxide in combination withtrifluoroacetic acid, thionyl chloride or oxalyl chloride, or in amethod using a chromate oxidizing agent such as Jones' reagent, Collins'reagent, pyridinium chlorochromate, or pyridinium dichromate. As asolvent, chlorinated hydrocarbon such as chloroform or dichloromethanemay be used. This aldehyde is cyclized easily to form the hemiacetal 6.

STEP 6

In this step, the hemiacetal 6 is allowed to react with an ylide to givethe starting compound II h(2S*-c) of the present invention. This stepmay be carried out in accordance with the manner of the Wittig reactiondescribed in Process I-7, Step 7.

STEP 7

In this step, the starting compound II h(2S*-c) of the present inventionis allowed to react in accordance with the manner of Process I-7, Step 8to give the compound of the present invention. In this step, thecarboxylate ester I h-a(2S*-c) of the 2S*-trans-sulfonamide derivativesI h(2S*-c), the free carboxylic acid I h-b(2S*-c) and the carboxylatesalt I h-c(2S*-c) can be prepared. ##STR30##

PROCESS IV-3 STEP 1

In this step, the compound 1'(2S*) is isomerized into the compound1'(2R*). This reaction is achieved in a solvent such as alcohol, e.g.,methanol or ethanol, ether, e.g., diethyl ether or tetrahydrofuran,aromatic solvent, e.g., toluene or xylene, or dimethylsulfoxide ordimethylformamide at room temperature or under heating for a period ofseveral hours to several tens of hours. According to necessity, acatalytic amount of basic substance such as diazobicyclononene,diazabicycloundecene, pyrrolidine-acetate, piperidine-acetate, sodiummethoxide, potassium tert-butoxide, lithium diisopropylamide,triethylamine or the like may be added.

STEP 2

In this step, the ketone 1'(2R*) is reduced to alcohol 1(2R*-c). As areducing agent, metal hydride, e.g., lithium aluminum hydride, lithiumtrimethoxyaluminum hydride, lithium tri-tert-butoxyaluminum hydride,lithium borohydride, or sodium borohydride is exemplified. As a solvent,dry alcohol, e.g., methanol or ethanol, or dry ethereal solvent, e.g.,diethyl ether or tetrahydrofuran is used. The reaction may be carriedout under cooling or heating within several hours.

The alcohol 1(2R*-t) prepared in this step is allowed to react inaccordance with the manner of Process IV-2, Steps 1 to 7 to give thecompounds of the present invention. The carboxylate ester I h-a(2R*-c)of the 2R-cis-sulfonamide derivatives, the free carboxylic acid Ih-b(2R*-c) or the carboxylate salt I h-c(2R*-c) is prepared.

STEP 3

In this step, the hydroxy of the compound 1(2R*-t) is converted into theazide which has the same configuration as that of the hydroxy. First,under Mitsunobu condition, that is, in the presence of ethylazodicarboxylate and triphenylphosphine, the compound 1(2R*-t) isallowed to react with a nucleophile to give the intermediate for theazide-formation. As the nucleophile, methyl bromide, methyl iodide,methyl p-toluenesulfonate, methyl benzenesulfonate, methylmethanesulfonate, zinc p-toluene-sulfonate, zinc benzenesulfonate, zincmethanesulfonate, lithium p-toluenesulfonate, lithium benzenesulfonate,lithium methanesulfonate, lithium benzenesulfonate, lithiummethanesulfonate or the like may be exemplified. As a solvent, etherealsolvent, e.g., diethyl ether or tetrahydrofuran, or benzene may be used.The reaction may be carried out under cooling or at room temperature forseveral hours. In this reaction, the compound 1(2R*-t) is respectivelyconverted into the corresponding sulfonate or halogenide with invertedconfiguration.

The intermediate is allowed to react with sodium azide to give the azide2(2R*-t) in a solvent such as hexamethylphosphoramide,dimethylformamide, dimethylsulfoxide or diphenyl ether under heating fora period of several tens of minutes to several hours.

The azide 2(2R*-t) prepared in this step is allowed to react inaccordance with the manner of Process IV-2, Steps 2 to 7 to give thecompounds of the present invention. The carboxylate ester I h-a(2R*-t)of the 2R-trans-sulfonamide derivatives, the free carboxylic acid Ih-b(2R*-t) or the carboxylate salt I h-c(2R*-t) is prepared.

In the reaction schemes, R₁, R₂, R₃, or X each is as defined before. R₄is diisopropylmethyl, isobutyl, tert-butyl, cyclopenyl, benzyl,diphenylmethyl, or triphenylmethyl. R₅ is a hydroxy-protecting groupsuch as methoxymethyl, benzyloxymethyl, benzyl, triphenylmethyl,trimethylsilyl or the like. R₆ is an alkanoyl or aroyl, such as formyl,acetyl, propionyl, pivaloyl, benzoyl, or phenylacetyl. R₇ is a hydrogenor a straight or branched alkyl such as methyl, ethyl, n-propyl,isopropyl, butyl or tert-butyl, or benzyl. L₁ is a leaving group such ashalogene, e.g., chlorine or bromine, or sulfonate, e.g.,methanesulfonate, benzenesulfonate or p-toluenesulfonate. Z is ahydrogen or methyl. THP is tetrahydro-2-pyranyl. Prot-N is an ordinarilyused amino-protecting group such as trifluoroacetyl, benzyloxycarbonyl,tert-butoxycarboxyl or triphenylmethyl. Prot-C is a carboxyl-protectinggroup such as methyl, ethyl, propyl, isopropyl, tert-butyl, benzyl,diphenylmethyl, triphenylmethyl, phthalimido or 4-picolyl. The wavy lineindicates the compound is a mixture of the epimers, or of α or βconfiguration.

The salts of the compounds represented by general formula (I) is asdefined before.

The following examples and physical constants are included to explainthe embodiment of the present invention in more detail, but these arenot intended to limit the scope of the invention.

In the following Examples, the respective compounds are represented byone of the enantiomers in each step. The absolute configuration of theoptical active compounds is indicated by the R and S designation intheir compound name or number.

The wavy line indicates the compound is a mixture of the epimers, or ofα or β configuration.

EXAMPLE I-1 EXAMPLE 1 Preparation ofdl-2-allyl-bicyclo[2.2.1]heptane-3-one ##STR31##

According to the method described in the literature [Tetr. Lett. 21,1897 (1980)] the compound 2 is prepareded as follow.

To a solution of 21.0 ml (0.15M) of diisopropylamine in 50 ml oftetrahydrofuran (hereinafter, abbreviated to THF) is dropwise added 94.0ml (0.15M) of n-butyl lithium (1.6M in n-hexane) at -30° C., which isstirred at -20° C. for 15 minutes. Separately, a solution of 16.5 g(0.15M) of norcamphor 1 (Aldrich) in 100 ml of THF is prepared and thesolution of lithium diisopropylamide prepared above is added thereto at-78° C., to which 14.3 ml (1.05M×1.1) of allyl bromide is added at -78°C. The reaction mixture is stirred and slowly warmed up to 20° C. over a1.5 hour period. The mixture solution is evaporated under reducedpressure until its volume become about 100 ml. Ether is added to theremaining mixture and then 300 ml of 2N hydrochloric acid added. Theorganic layer collected is dried over anhydrous sodium sulfate, andevaporated under reduced pressure. The residue is distilled underreduced pressure to give 17.0 g of the titled compound 2 as a distillatewith b.p. 88°-98° C./15 mmHg in 75.6% yield. Colorless oil, lit;(liquid, b.p. 92° C./10 mmHg).

EXAMPLE 2 Preparation of 2-allyl-3(E)-hydroxyimino-bicyclo[2.2.1]heptane3a and 2-allyl-3(Z)-hydroxyimino-bicyclo[2.2.1]heptane 3b ##STR32##

To 60 ml of methanol are added 6.00 g (40 mM)2-allyl-bicyclo[2.2.1]heptane-2-one 2, 5.56 g (80 mM) of hydroxylaminehydrochloride and 4.49 g (80 mM) of powderly potassium hydroxide at 0°C., and the mixture is stirred at 25° C. for 30 minutes. The reactionmixture is then distributed between ether and 0.1N hydrochloric acid,and the organic layer is washed with water, dried over anhydrous sodiumsulfate and evaporated under reduced pressure. The residue ischromatographed on an silica-gel (hereinafter abbreviated to SiO₂)column [Merck, Lobar C; eluted with n-hexane-ethyl acetate (95:5)(hereinafter, ethyl acetate is abbreviated to AcOEt)] to give 3.76 g ofthe 3(E)-oxime 3a as an early eluate in 56.71% yield. Colorless oil.

¹ H-NMR(CDCl₃) δ ppm: 1.03˜1.90(m, 7H), 1.90˜2.60(m,4H), 3.50(br.s, 1H),4.86˜5.25(m, 2H), 5.60˜6.18(m, 1H).

IR(CHCl₃) νmax: 3590, 3285, 3140, 3080, 1680, 1640 cm⁻¹.

Anal. Calcd. for C₁₀ H₁₅ NO: (%): C 72.67, H 9.17, N 8.48, Found: (%): C72.38, H 9.14, N 8.49.

The late eluate gives 2.02 g of the 3(Z)-oxime in 30.64% yield.Colorless oil.

¹ H-NMR(CDCl₃) δ ppm: 1.15˜2.00(m, 7H), 2.15˜3.15(m, 5H), 4.90˜5.22(m,2H), 5.60˜6.12(m, 1H).

IR(CHCl₃) νmax: 3590, 3280, 3140, 3085, 1678, 1641 cm⁻¹.

Anal. Calcd. for C₁₀ H₁₅ NO: (%): C 72.67, H 9.17, N 8.48, Found: (%): C72.45, H 9.26, N 8.21.

EXAMPLE 3 2-Allyl-3-benzyloxycarbonylamino-bicyclo[2.2.1]heptane##STR33##

To a solution of 6.26 g (37.9 mM) of2-allyl-3(E)-hydroxyimino-bicyclo[2.2.1]heptane 3a in 60 ml of dry THFis added 1.44 g (3.79 mM) of lithium aluminum hydride, and the mixtureis refluxed for 1.5 hours. After being decomposed with addition ofwater, as usual, the reaction mixture is extracted with AcOEt and thenwith diluted hydrochloric acid. The aqueous layer is then washed withAcOEt, then alkalined with 0.1N-sodium hydroxyide (hereinafterabbreviated to NaOH) aqueous solution, and then extracted with AcOEt.The extract is dried over anhydrous sodium sulfate (hereinafterabbreviated to Na₂ SO₄) and evaporated under reduced pressure. Withoutfurther purification, 4.4 g (29.1 mM) of the resulting amine 4 isdissolved immediately in 30 ml of dichloromethane (hereinafterabbreviated to CH₂ Cl₂), to which are added 2.87 ml (29.1 mM×1.2) ofpyridine and 5.0 ml (29.1×1.2) of benzyloxycarbonyl chloried at 0° C.,and the mixture is stirred at the same temperature for 30 minutes. Thereaction mixture is distributed between CH₂ Cl₂ and 0.2N hydrochloricacid, and the organic layer is dried over anhydrous sodium sulfate andconcentrated under reduced pressure. The residue is chromatographed on aSiO₂ column [Merck, Lobar C; eluted with n-hexane-AcOEt (9:1)] to give4.27 g of the titled compound 5 in 39.5% yield. Colorless columnarcrystals, mp. 60°-61° C.

IR(CHCl₃) νmax: 3430, 1715, 1505 cm⁻¹.

¹ H-NMR(CDCl₃) δ ppm: 0.74˜1.89(m, 7H), 1.90˜2.30(m, 3H), 2.43(br.s,1H), 3.53(t, d, J=4, 7 Hz,1H), 4.80(br.s, 1H), 4.91(m, 1H), 5.09(s, 2H),5.50˜6.00(m, 1H), 7.36(s, 5H).

Anal. Calcd. for C₁₈ H₂₃ NO₂ : (%): C 75.74, H 8.14, N 4.91 Found: (%):C 75.84, H 8.10, N 4.95.

Reduction of 3.37 g (20.4 mM) of2-allyl-3(Z)hydroxylimino-bicyclo[2.2.1]heptane 3b with lithium aluminumhydride in the same manner as mentioned above, also affords 2.2 g ofamine 4 which further yields 2.13 g of the titled compound 5 in 40.0%yield. IR and NMR spectrum of the compounds 4 and 5 prepared from theZ-isomer are the same as those prepared from the E-isomer.

EXAMPLE 42-(2,3-Epoxypropyl)-3-benzyloxycarbonylaminobicyclo[2.2.1]heptane##STR34##

To a solution of 6.8 g (23.8 mM) of2-allyl-3-benzyloxycarbonylaminobicyclo[2.2.1]heptane 5 in 150 ml of CH₂Cl₂ is added 10.3 g (23.8 mM×2) of m-chloroperbenzoic acid at 0° C. andthe mixture is stirred at 20° C. for 3 hours. The resulting crystals areremoved by filtration and the filtrate is washed successively with 10%aqueous solution of sodium thiosulfate, 5% aqueous solution of sodiumhydrogencarbonate and water, dried over Na₂ SO₄, and then concentratedunder reduced pressure. The residue is chromatographed on a SiO₂ column[Merck; Lobar C; eluted with n-hexane-AcOEt (4:1)] to give 7.17 g of thetitled compound 6 in 100% yield. Colorless oil.

IR(CHCl₃) νmax: 3455, 1717, 1505, 1479, 1456 cm⁻¹.

¹ H-NMR(CDCl₃) δ ppm: 1.00˜1.85(m, 9H), 2.05(br.s, 1H), 2.40(br.s, 1H),2.43(m, 1H), 2.70(m, 1H), 2.89(m, 1H), 3.55(m, 1H), 4.90(m, 1H), 5.06(s,2H), 7.32(s, 5H).

Anal. Calcd. for C₁₈ H₂₃ NO₃.0.1H₂ O (%): C 71.29, H 7.72, N 4.62, Found(%): C 71.27, H 7.47, N 4.57.

EXAMPLE 5 Methyl7-[2(S*)-2-exo-3-endo-(3-benzyloxycarbonylamino)bicyclo[2.2.1]hept-2-yl]-5(Z)-heptenoateacid 8 ##STR35##

To a solution of 4.52 g (15 mM) of the epoxide 6 in 50 ml of dioxane isadded 15 ml of aqueous solution containing of 6.84 g (30 mM) of periodicacid dihydrate at 25° C. and the mixture is stirred for 4 hours at thesame temperature. AcOEt is added, and the mixture is washed with water,dried over Na₂ SO₄, and evaporated to give 3.97 g of the aldehyde 7.

To 100 ml of dimethyl sulfoxide (hereinafter abbreviated to DMSO) isadded 2.88 g (13.8 mM×6×0.9) of sodium hydride (60% in mineral oil) at25° C., and the mixture is stirred at 70° C. until no hydrogen gas isevolved (about 1.5 hours). To the solution is added at 18° C. 17.8 g(13.8 mM×3×0.97) of 5-carboxybutyltriphenylphosphonium bromide which isprepared from triphenylphosphine and 5-bromopentanoic acid, and then 40ml of DMSO added, and the mixture is stirred for 20 minutes at 20° C.

To this mixture is added a solution of 3.97 g of the above preparedaldehyde 7 in 60 ml of DMSO at 18° to 20° C., and the mixture is stirredat 25° C. for 4 hours. The reaction mixture is allowed to standovernight, then diluted with AcOEt, washed with 0.1N hydrochloric acid,and then with water, dried over sodium sulfate, and evaporated underreduced pressure. The residue is dissolved in 50 ml of AcOEt, to which adistilled diazomethane ether solution is added in the usual manner foresterification. The solvent is evaporated under reduced pressure and theresidue is chromatographed on a SiO₂ column [Merck, Lobar C; eluted withn-hexane/AcOEt (9:1)] to give 2.80 g of the titled compound 8 in 48.4%yield (from the epoxide). Colorless oil.

IR(CHCl₃) νmax: 3450, 1721, 1602, 1501, 1453, 1437 cm⁻¹.

¹ H-NMR(CDCl₃) δ ppm: 1.00˜1.85(m, 9H), 1.85˜2.30(m, 5H), 2.30(t, J=7Hz, 2H), 2.40(br.s, 1H), 3.50(t, d, J=4, 7 Hz, 1H), 3.63(s, 3H), 4.93(d,J=7 Hz, 1H), 5.09(s, 2H), 5.36(m, 2H), 7.34(s, 5H).

Anal. Calcd. for C₂₃ H₃₁ NO₄ : (%): C 71.65, H 8.12, N 3.63, Found: (%):C 71.60, H 7.95, N 3.71.

EXAMPLE 6 Methyl 7-[(3-aminobicyclo[2.2.1]hept-2-yl)]-5-heptenoate 10##STR36##

A mixture of 771 mg (2 mM) of the compound 8, 10 ml of trifluoroaceticacid and 2 ml of anisole is heated at 45° C. for 3 hours. The reactionmixture is evaporated under reduced pressure. Benzene is added to theresidue and evaporated. This procedure is repeated 3 times. Theresulting residue is rinsed well with petroleum ether and evaporatedunder reduced pressure to give 500 mg of the trifluoroacetate salt 9 asa light brown oil in 99.6% yield.

This compound may be used in the next reaction even in the form of salt.

¹ H-NMR(CDCl₃) δ ppm: 1.10˜2.50(m, 15H), 2.32(t, J=7 Hz,2H), 3.08(m,1H), 3.68(s, 3H), 5.40(m, 2H), 7.60(br,2H), 8.85(br, 1H).

IR(CHCl₃) νmax: 3100br, 2560br, 1779, 1725, 1675, 1522, 1436 cm⁻¹.

This salt 9 is distributed between water and ether and then the aqueouslayer is collected and washed with ether, made alkaline with sodiumcarbonate aqueous solution, and extracted with AcOEt. The AcOEt layer iswashed with water, dried over Na₂ SO₄ and evaporated to give 330 mg ofthe amine 10 in 65.7% yield.

IR(CHCl₃) νmax: 3400br, 1728, 1600, 1583 cm⁻¹.

¹ H-NMR(CDCl₃) δ ppm: 1.00˜2.35(m, 17H), 2.30(t, J=7 Hz,2H), 2.73(m,1H), 3.64(s, 3H), 5.40(m, 2H).

EXAMPLE 7

Methyl 5Z-7-[3-phenylsulfonamidobicyclo[2.2.1]hept-2-yl]-5-heptenoateand Methyl 5Z-7-[3-hexylsulfonamidobicyclo[2.2.1]hept-2-yl]-5-heptenoate##STR37##

To a solution of 140 mg (0.557 mM) of the amine 10 in 3 ml of CH₂ Cl₂ isadded 155 μl (0.557 mM×2) of triethylamine and 107 μl (0.557 mM×1.5) ofbenzenesulfonyl chloride at 0° C., and the mixture is stirred at 23° C.for 15 minutes. The reaction mixture is diluted with AcOEt and washedwith 0.1N hydrochloric acid, and then successively, with water, 5%sodium hydrogencarbonate aqueous solution and water, and dried over Na₂SO₄. The solvent is evaporated under reduced pressure and the residue ischromatographed on a SiO₂ column [Merck, Lobar A; eluted withn-hexane-AcOEt (9:1)] to give 188 mg of the benzenesulfonamide 11 in86.2% yield. Colorless oil.

IR(CHCl₃) νmax: 3375, 1725, 1158, 1090 cm⁻¹.

¹ H-NMR(CDCl₃) δ ppm: 0.80˜2.10(m, 15H), 2.17(br.s, 1H), 2.26(t, J=7 Hz,2H), 3.02(m, 1H), 3.67(s, 3H), 5.20(m,2H), 7.40˜7.65(m, 3H),7.83˜8.03(m, 2H).

Anal. Calcd. for C₂₁ H₂₉ NO₄ S: (%): C 64.41, H 7.48, N 3.58, S 8.19,Found (%): C 64.51, H 7.48, N 3.61, S 7.87.

n-Hexylsulfonyl chloride is used in the place of the above-mentionedbenzenesulfonyl chloride to give hexylsulfonamide 13 in 42.3% yield.Pale yellow oil.

¹ H-NMR(CDCl₃) δ ppm: 0.89(t, J=7 Hz, 3H), 1.00˜2.25(m,22H), 2.30(t, J=7Hz, 2H), 2.35(br.s, 1H), 2.85˜3.06(m,2H), 3.22(t, d, J=4, 7 Hz, 1H),3.65(s, 3H), 4.73(d, J=7 Hz, 1H), 5.39(m, 2H).

IR(CHCl₃) νmax: 3400, 3295, 1730, 1458, 1437, 1409 cm⁻¹.

Anal. Calcd. for C₂₁ H₃₇ NO₄ S (%): C 63.11, H 9.35, N 3.51, S 8.02,Found (%): C 62.98, H 9.29, N 3.56, S 7.72.

EXAMPLE 8 7-[3-Phenylsulfonamidobicyclo[2.2.1]hept-2-yl]-5-heptenoicacid and its sodium salt 12 ##STR38##

To a solution of 150 mg (0.383 mM) of the ester 11 in 2.0 ml of methanolis added 0.77 ml (0.383 mM×2) of 1N sodium hydroxide aqueous solution at23° C. and the mixture is allowed to stand overnight at the sametemperature. The reaction mixture is distributed between ether andwater, and the aqueous layer is acidified with hydrochloric acid andextracted with AcOEt. The organic layer is washed with water, dried overNa₂ SO₄, and evaporated under reduced pressure. The resulting crudecrystals are recrystallized from ether and n-hexane to give 126 mg ofthe carboxylic acid 12 in 87.5% yield. Colorless prisms.

Mp. 85°-86° C. IRνmax: 3380, 3550˜2500, 1710, 1160, 1090 cm⁻¹.

¹ H-NMR(CDCl₃) δ ppm: 0.85˜2.30(m, 15H), 2.31(t, J=7 Hz, 2H), 3.00(t, d,J=4, 7 Hz, 1H), 5.20(m, 2H), 5.69(d, J=7 Hz,1H), 7.43˜7.70(m, 3H),7.83˜8.10(m, 2H), 9.52(br.s, 1H).

Anal. Calcd. for C₂₀ H₂₇ NO₄ S (%): C 63.62, H 7.22, N 3.71, S 8.49,Found (%): C 63.67, H 7.15, N 3.71, S 8.36. Sodium salt of compound 12

Anal. Calcd. for C₂₀ H₂₆ NO₄ SNa H₂ O (%): C 59.46, H 6.61, N 3.47, S7.94, Na 5.69, Found (%): C 59.26, H 6.60, N 3.59, S 7.95, Na 5.63.

¹ H-NMR(D₂ O ext TMS) δ ppm: 1.40˜2.65(m, 17H), 3.36(m,1H), 5.53(m, 2H),8.00˜8.39(m, 5H).

IR(KBr) νmax: 3390br, 3270, 1560, 1445, 1408 cm⁻¹.

The following ester 13 is hydrolyzed in the same manner as mentionedabove to give the carboxylic acid 14. ##STR39##

Yield 97.8%, Colorless oil.

IR(CHCl₃) νmax: 3380, 3500˜2450, 1710, 1142 cm⁻¹.

¹ H-NMR(CDCl₃) δ:0.88(t, J=7 Hz, 3H), 1.00˜2.25(m, 22H), 2.33(br.s, 1H),2.34(t, J=7 Hz, 2H), 2.85˜3.10(m, 2H), 3.20(t, d, J=4, 7 Hz, 1H),4.85(d, J=7 Hz, 1H), 5.39(m, 2H), 8.30(br.s, 1H).

EXAMPLE 9 Methyl5Z-7-[3-methanesulfonamidobicyclo[2.2.1]hept-2-yl]-5-heptenoate##STR40##

To a solution of 129 mg (0.35 mmole) of the starting material 9 is added148 μl (3×0.35 mmole) of triethylamine and then 41 μl (1.5×0.35 mmole)of methanesulfonyl chloride under ice-cooling in an atmosphere ofnitrogen, and the mixture is stirred at room temperature for 30 minutes.The reaction mixture is poured into a mixture of AcOEt and 0.2Nhydrochloric acid. The AcOEt layer is washed with 5% sodiumhydrogencarbonate and water, dried over magnesium sulfate, andevaporated. The oily residue is applied to chromatography on a column of8 g of SiO₂ (containing 10% of water). The eluate with benzene-AcOEt iscollected and evaporated to give 85 mg of the titled compound 15 as anoily residue in 73.7% yield.

Anal. Calcd. for C₁₆ H₂₇ NO₄ S.0.05C₆ H₆ (%): C 58.72, H 8.25, N 4.20, S9.62, (%): C 58.71, H 8.13, N 4.27, S 9.18.

IR(CHCl₃) νmax: 3400, 3302, 1730.5 cm⁻¹.

¹ H-NMR(CDCl₃) δ ppm: 1.00˜2.13(m, 15H), 2.32(t, J=7 Hz,2H), 2.95(s,3H), 3.23(m, 1H), 3.67(s, 3H), 4.99(d, J=7 Hz,1H), 5.41(m, 2H).

EXAMPLE 10 Methyl5Z-7-[3-p-methoxybenzenesulfonamidobicyclo[2.2.1]hept-2-yl]-5-heptenoate##STR41##

To a solution of 129 mg (0.35 mmole) of the starting material 9 in 2 mlof CH₂ Cl₂ is added 148 μl (3×0.35 mmole) of triethylamine and then 108mg (1.5×0.35 mmole) of p-methoxybenzenesulfonyl chloride in anatmosphere of nitrogen under ice-cooling, and the mixture is stirred atroom temperature for an hour. The reaction mixture is distributedbetween AcOEt and 0.2N hydrochloric acid. The AcOEt layer is washed with5% sodium hydrogencarbonate and water, dried over magnesium sulfate, andevaporated under reduced pressure. The oily residue is chromatographedon a column of 8 g of SiO₂ (containing 10% water). The eluate withbenzene-AcOEt (9:1) is collected and evaporated to give 104 mg of theaimed product 16 as an oily material in 70.5% yield.

Anal. Calcd. for C₂₂ H₃₁ NO₅ S.0.15C₆ H₆ (%): C 63.48, H 7.42, N 3.23, S7.40, Found (%): C 63.24, H 7.33, N 3.28, S 6.99.

IR(CHCl₃) νmax: 3385, 3282, 1730, 1599, 1580, 1499 cm⁻¹.

¹ H-NMR(CDCl₃) δ ppm: 0.87˜2.15(m, 15H), 2.25(t, J=7 Hz, 2H), 2.95(m,1H), 3.65(s, 3H), 3.85(s, 3H), 5.20(m, 3H), 6.94(A₂ B₂ q, Apart J=9 Hz2H), 7.81(A₂ B₂ q, Bpart J=9 Hz, 2H).

EXAMPLE 11 Methyl5(Z)-7-[3-p-Nitrobenzenesulfonamidobicyclo[2.2.1]hept-2-yl]heptenoate##STR42##

To a solution of 205 mg (0.56 mmole) of the starting material 9 in 3 mlof CH₂ Cl₂ is added 235 μl (3×0.56 mmole) of triethylamine and then 186mg (1.5×0.56 mmole) of p-nitrobenzenesufonyl chloride in an atmosphereof nitrogen under ice-cooling, and the mixture is stirred at roomtemperature for 30 minutes. The reaction mixture is poured into amixture of AcOEt and 0.2N hydrochloric acid. The AcOEt layer is washedwith 5% sodium hydrogencarbonate aqueous solution and water, dried overmagnesium sulfate, and evaporated under reduced pressure. The oilyresidue is applied to chromatography on a column of 10 g of SiO₂(containing 10% of water) and the eluate with benzene-AcOEt(20:1) iscollected and evaporated to give 130 mg of the titled compound as anoily residue in 53% yield.

Anal. Calcd. for C₂₁ H₂₈ N₂ O₆ S.0.2C₆ H₆ (%): C 58.96, H 6.51, N 6.20,S 7.09, Found (%): C 58.91, H 6.51, N 6.14, S 6.53.

IR(CHCl₃) νmax: 3400, 3295, 1731, 1610, 1534 cm⁻¹.

NMR(CDCl₃) δ ppm: 1.02˜2.17(m, 15H), 2.28(t, J=7 Hz,2H), 3.06(m, 1H),3.69(s, 3H), 5.23(m, 2H), 5.72(d, J=6 Hz,1H), 8.12(A₂ B₂ q, Apart J=9Hz, 2H), 8.37(A₂ B₂ q, Bpart J=9 Hz, 2H).

EXAMPLE 125Z-7-[3-Methanesulfonamidobicyclo[2.2.1]hept-2-yl]-5-heptenoic acid andits sodium salt 18 ##STR43##

To a solution of 71 mg (0.22 mmole) of the starting material 15 in 1.2ml of methanol is added 431 μl (2×0.22 mmole) of 1N sodium hydroxide andthe mixture is stirred at 23° C. for 4 hours. The reaction mixture ispoured into a mixture of AcOEt and 0.2N hydrochloric acid. The AcOEtlayer is washed with saturated sodium chloride aqueous solution anddried over magnesium sulfate and evaporated under reduced pressure togive 65 mg of the carboxylic acid 18 as an oily product in 93.6% yield.

¹ H-NMR(CDCl₃) δ ppm: 1.02˜2.37(m, 15H), 2.35(t, J=7 Hz, 2H), 2.95(s,3H), 3.22(m, 1H), 5.20(d, J=6 Hz, 1H), 5.40(m, 2H).

To a solution of 65 mg (0.206 mM) of this carboxylic acid 18 in 1 ml ofmethanol is added 806 μl (0.9×0.206 mM) of 0.23N sodium methoxide, andthe mixture is allowed to stand for 5 minutes, and evaporated. Theresidue is dissolved in 1.5 ml of water, and freeze-dried to give 69 mgof the titled compound 18 as white powder in 99% yield.

Anal. Calcd. C₁₅ H₂₄ NO₄ SNa.0.25H₂ O (%): C 52.69, H 7.22, N 4.10 S9.38, Na 6.72, Found (%): C 52.74, H 7.17, N 3.91 S 9.34, Na 6.92.

IR(KBr) νmax: 3400br, 3245, 1636sh, 1560, 1450, 1404 cm⁻¹.

¹ H-NMR(d-MeOH) δ ppm: 1.08˜2.35(m, 17H), 2.92(s, 3H), 3.18(m, 1H),3.43(m, 2H).

EXAMPLE 135Z-7-[3-p-Methoxybenzenesulfonamidobicyclo[2.2.1]hept-2-yl]-5-heptenoicacid and its sodium salt 19 ##STR44##

To a solution of 84 mg (0.2 mmole) of the starting material 16 in 1.2 mlof methanol is added 398 μl (2×0.2 mmole) of 1N NaOH and the mixture isstirred at 23° C. for 7 hours. The reaction mixture is poured intoAcOEt-0.2N hydrochloric acid and distributed. The AcOEt layer is washedwith saturated sodium chloride aqueous solution, dried over magnesiumsulfate and evaporated under reduced pressure to give 81 mg of the oilyresidue 19(carboxylic acid) in 99% yield.

¹ H-NMR (CDCl₃) δ ppm: 0.95-2.12(m, 15H), 230(t, J=7 Hz, 2H), 2.97(m,1H), 3.84(s, 3H), 5.25(m, 3H), 6.94(A₂ B₂ q, A part J=9 Hz, 2H), 7.78(A₂B₂ q, B part J=9 Hz, 2H), 9.19(brs, 1H).

To a solution of 81 mg of the above prepared carboxylic acid 19 in 1 mlof methanol is added 782 μl (0.9×0.2 mmole) of 0.23N sodium methoxide,and the mixture is allowed to stand for 5 minutes. The reaction mixtureis evaporated and the residue is dissolved in 1.5 ml of water andlyophilized to give 81 mg of the titled compound 19 as white powder in94% yield.

Anal. Calcd. for C₂₁ H₂₈ NO₅ SNa.0.25H₂ O (%): C 58.12, H 6.62, N 3.23,S 7.39, Na 5.30, Found (%): C 58.14, H 6.61, N 3.31, S 7.20, Na 5.39.

IR(KBr) νmax: 3400br, 3280, 1640sh, 1598, 1576, 1560br, 1500, 1458,1439, 1405 cm⁻¹.

¹ H-NMR(d-MeOH) δ ppm: 0.87˜2.13(m, 15H), 2.12(t, J=7 Hz,2H), 2.89(m,1H), 3.87(s, 3H), 5.21(m, 2H), 7.07(A₂ B₂ q, A part J=9 Hz, 2H), 7.81(A₂B₂ q, B part J=9 Hz, 2H).

EXAMPLE 145Z-7-[3-p-Nitrobenzenesulfonamidobicyclo[2.2.1]hept-2-yl]-5-heptenoicacid and its sodium salt 20 ##STR45##

To a solution of 117 mg (0.268 mmole) of the starting compound 17 in 1ml of methanol is added 536 μl (2×0.268 mmole) of 1N potassium hydroxideand the mixture is stirred at 23° C. for 24 hours. The reaction mixtureis distributed between AcOEt and 0.2N hydrochloric acid. The AcOEt layeris washed with saturated sodium chloride aqueous solution, dried overmagnesium sulfate, and evaporated under reduced pressure to give 109 mgof the oily residue 20(carboxylic acid) in 96.2% yield.

¹ H-NMR(CDCl₃) δ ppm: 1.0˜2.13(m, 15H), 2.32(t, J=7 Hz, 2H), 3.06(m,1H), 5.22(m, 2H), 5.69(d, J=7 Hz, 1H), 8.08(A₂ B₂ q A part J=9 Hz, 2H),8.35(A₂ B₂ q B part J=9 Hz, 2H), 9.86(brs, 1H).

To a solution of 109 mg of the above prepared carboxylic acid 20 in 1.5ml of methanol is added 1 ml (0.9×0.26 mM) of 0.23N sodium methoxide andthe mixture is allowed to stand for 5 minutes. The reaction mixture isevaporated under reduced pressure and the residue is dissolved in 1.5 mlof water and freeze-dried to give 107 mg of the titled compound 20 aswhite powder in 92.6% yield.

Anal. Calcd. for C₂₀ H₂₆ N₂ O₆ SNa (%): C: 54.04, H: 5.67, N: 6.30, S:7.21, Na: 5.17, Found (%): C: 54.08, H: 5.98, N: 6.16, S: 7.03, Na:4.54.

IR(KBr) νmax: 3385br, 1650sh, 1605, 1560, 1529, 1400 cm⁻¹.

¹ H-NMR(d-MeOH) δ ppm: 1.05˜1.92(m, 15H), 2.11(t, J=7 Hz, 2H), 3.00(m,1H), 5.15(m, 2H), 8.08(A₂ B₂ q A part J=9 Hz, 2H), 8.40(A₂ B₂ q B partJ=9 Hz, 2H).

EXAMPLES 15 TO 29

The following compounds are prepared in the same manner as mentionedabove.

    TABLE 1      ##STR46##           Elementary Analysis       (Molecular Formula)     Calcd. (%)     Compd. No. R.sub.1 R.sub.2 Mp. (°C.) Found (%) IR ν max     cm.sup.-1 NMR δ      ppm                                                         21 CH.sub.3      ##STR47##      94˜98 C.sub.23 H.sub.34 N.sub.2 O.sub.4 SC: 63.56 H: 7.89 N: 6.45     S: 7.38C: 63.20 H: 7.84 N: 6.40 S: 7.16 (CHCl.sub.3)3390, 1730.5,     1600,1514, 1149, 1098. 0.93˜2.15(m, 15H), 2.25(t, J=7Hz, 2H),     2.95(m, 1H),3.00(s, 6H), 3.65(s, 3H), 4.98(d, J=7Hz, 1H), 5.20(m, 2H),     6.63(A.sub.2 B.sub.2 -q, Apart, J=9Hz, 2H),7.68(A.sub.2 B.sub.2 -q,     Bpart, J=9Hz, 2H).      22 H     ##STR48##         0.93˜2.15(m, 15H), 2.30(t, J=7Hz, 2H), 2.96(m, 1H),3.02(s,     6H), 5.24(m, 2H), 6.65(A.sub.2 B.sub.2 -q, A part,, J=10Hz, 2H),     7.70(A.sub.2 B.sub.2 -q, Bpart, J=10Hz, 2H), 9.15(br. s,1H).  23 Na      ##STR49##       C.sub.22 H.sub.31 N.sub.2 O.sub.4 SNaC: 58.70 H: 7.13 N: 6.22 S:     7.12C: 59.00 H: 7.09 N: 6.33 S: 7.24 (KBr)3430, 3260, 1600, 1564,1518,     1409, 1369, 1311,1146, 1097. 0.89˜2.15(m, 15H), 2.10(t, J=7Hz,     2H), 2.85(m, 1H),3.02(s, 6H), 5.16(m, 2H), 6.24(A.sub.2 B.sub.2 -q, A     part, J=10Hz, 2H), 7.13(A.sub.2 B.sub.2 -q, Bpart, J=10Hz, 2H).  24     CH.sub.3      ##STR50##       C.sub.25 H.sub.31 NSO.sub.4C: 65.15 H: 7.71 N: 3.45 S: 7.91C: 65.10 H:     7.68 N: 3.54 S: 7.58 (CHCl.sub.3) 3390, 1730.5, 1600,1158, 1093.     0.98˜2.15(m, 15H), 2.25(t, J=7Hz, 2H), 2.40(s, 3H),2.95(m, 1H),     3.64(s, 3H), 5.18(m, 2H), 5.42(d, J=7Hz, 1H), 7.27(A.sub.2 B.sub.2     q-Apart, J=8Hz, 2H), 7.7 7(A.sub.2 B.sub.2 q-Bpart, J=8Hz, 2H).  25 H      ##STR51##         0.96˜2.13(m, 15H), 2.31(t, J=7Hz, 2H), 2.40(s, 3H),2.97(m,     1H), 5.20(m, 2H), 5.67(d, J=7Hz, 1H), 7.29(A.sub.2 B.sub.2 q-Apart,     J=8Hz, 2H), 7.78(A.sub.2 B.sub.2 q-Bpart, J=8Hz,2H), 9.91(br. s, 1H).     26 Na      ##STR52##       C.sub.21 H.sub.28 NSO.sub.4 Na.0.56H.sub.2 OC: 59.55 H: 6.93 N: 3.31     S: 7.57Na: 5.43C: 59.79 H: 6.94 N: 3.42 S: 7.27Na: 5.36 (KBr)3420, 3285,     1560, 1490,1318, 1154, 1092. 0.8˜2.01(m, 17H), 2.34(s, 3H),     2.75(m, 1H), 2.92(m, 1H), 5.24(m, 2H), 7.17(A.sub.2 B.sub.2 q-Apart,     J=8Hz, 2H), 7.77(A.sub.2 B.sub.2 q-Bpart, J=8Hz, 2H).  27 CH.sub.3      ##STR53##       C.sub.22 H.sub.31 NO.sub.4 S.0.1C.sub.6 H.sub.6C: 65.66 H: 7.71 N:     3.39 S: 7.76C: 65.43 H: 7.75 N: 3.33 S: 7.50 (CHCl.sub.3)3395, 3300,     1730,1600, 1458, 1436,1317, 1155, 1067. 0.90˜2.15(m, 15H), 2.27(t,     J=7Hz, 2H), 2.67(s, 3H),2.98(m, 1H), 3.67(s, 3H), 5.20(m, 2H), 5.47(d,     J=7Hz, 1H), 7.35(m, 3H) , 8.02(m, 1H).      28 H     ##STR54##         0.97˜2.15(m, 15H), 2.21(t, J=7Hz, 2H), 2.65(s, 3H),2.97(m,     1H), 5.20(m, 2H), 5.45(d, J=7Hz, 1H), 7.37(m, 3H), 8.00(m, 1H).  29 Na      ##STR55##       C.sub.21 H.sub.28 NO.sub.4 SNa.0.6H.sub.2 OC: 59.44 H: 6.94 N: 3.30 S:     7.56Na: 5.42C: 59.42 H: 6.87 N: 3.26 S: 7.50Na: 5.48 (KBr)3435, 3300,     1564,1412, 1316, 1157. 0.80˜2.18(m, 17H), 2.63(s, 3H), 3.04(m,     2H), 5.24(m, 2H), 7.30(m, 3H), 7.97(m, 1H).      30 CH.sub.3     ##STR56##      69˜72 C.sub.23 H.sub.33 NO.sub.4 SC: 65.84 H: 7.93 N: 3.34 S:     C     7.64: 65.82 H: 7.86 N: 3.47 S: 7.53 (CHCl.sub.3)3395, 3285, 1730,1600,     1095, 1054. 0.87˜2.15(m, 15H), 1.24(t, J=7Hz, 3H), 2.25(t, J=7Hz,     2H), 2.70(q, J=7Hz, 2H), 2.97(m, 1H), 3.65(s,3H), 5.20(m, 3H), 7.30(A.sub     .2 B.sub.2 -q, Apart, J=8Hz, 2H),7.79(A.sub.2 B.sub.2 -q, Bpart, J=8Hz,     2H).      31 H     ##STR57##         1.06˜2.16(m, 15H), 1.24(t, J=7Hz, 3H), 2.30(t, J=7Hz, 2H),     2.70(q, J=7Hz, 2H), 2.98(m, 1H), 5.19(m,2H), 5.78(d, J=7Hz, 1H),     7.31(A.sub.2 B.sub.2 -q, Apart, J=8Hz,2H), 7.82(A.sub.2 B.sub.2 -q,     Bpart, J=8Hz, 2H), 10.69(s, 1H).      32 Na     ##STR58##       C.sub.22 H.sub.30 NO.sub.4 SNa.H.sub.2 O C: 61.28 H: 7.11 N: 3.25 S:     7.44C: 61.10 H: 7.06 N: 3.33 S: 7.42 (KBr)3430, 3280, 1685sh,1458, 1408,     1155,1095. 1.08˜2.20(m, 17H), 1.24(t, J=7Hz, 3H), 2.72(q,J=7Hz,     2H), 2.88(m, 1H), 5.15(m, 2H), 7.37(A.sub.2 B.sub.2 q-Apart, J=8Hz, 2H),     7.77(A.sub.2 B.sub.2 q-Bpart, J=8Hz, 2H).      33 CH.sub.3     ##STR59##       C.sub.26 H.sub.33 NO.sub.4 SCL 67.64 H: 8.52 N: 3.03 S: 6.95C: 67.47     H: 8.43 N: 3.06 S: 6.82 (CHCl.sub.3)3395, 3285, 1730, 1601,1094, 1055.     0.81˜2.15(m, 24H), 2.26(t, J=7Hz, 2H), 2.66(t, J=7Hz, 2H), 2.92(m,     1H), 3.65(s, 3H), 5.17(m, 2H), 5.51(d, J=7Hz, 1H), 7.28(A.sub.2 B.sub.2     q-Apart, J=8Hz, 2H), 7.80(A.sub.2 B.sub.2 q-Bpart, J=8Hz, 2H).  34 H      ##STR60##         0.80˜2.15(m, 24H), 2.32(t, J=7Hz, 2H), 2.68(t, J=7Hz, 2H),     3.02(m, 1H), 5.22(m, 2H), 5.38(d, J=7Hz,1H), 7.30(A.sub.2 B.sub.2     q-Apart, J=8Hz, 2H), 7.81(A.sub.2 B.sub.2 q-Bpart, J=8Hz, 2H), 9.86(br.     s, 1H).      35 Na     ##STR61##       C.sub.25 H.sub.36 NO.sub.4 SNa.0.4H.sub.2 OC: 62.97 H: 7.78 N: 2.94 S:     6.73C: 63.24 H: 7.78 N: 3.01 S: 6.42 (KBr)3400, 3280, 1695, 1564,1455,     1430, 1410, 11551094. 0.82˜2.20(m, 26H), 2.68(t, J=7Hz, 2H),     2.90(m, 1H),5.15(m, 2H), 7.33(A.sub.2 B.sub.2      q-Apart, J=8Hz, 2H),7.76(A.sub.2 B.sub.2 q-Bpart, J=8Hz, 2H).  36     CH.sub.3      ##STR62##       C.sub.22 H.sub.29 NO.sub.6 S.0.2C.sub.6 H.sub.6C: 61.76 H: 6.74 N:     C     3.10L 61.84 H: 6.90 N: 3.33 (CHCl.sub.3)3385, 3280, 2650, 2530,1725,     1700.5, 1602,1575, 1162, 1089. 0.90˜2.17(m, 15H), 2.29(t, J=7Hz,     2H), 3.07(m, 1H),3.69(s, 3H), 5.23(m, 2H), 5.57(d, J=7Hz, 1H), 8.03(A.sub     .2 B.sub.2 q-Apart, J=8Hz, 2H), 8.25(A.sub.2 B.sub.2 q-Bpart, J=8Hz,     2H), 9.35(s, 1H).      37 H     ##STR63##       C.sub.21 H.sub.27 NO.sub.6 S.0.4H.sub.2 OC: 58.83 H: 6.54 N: 3.27 S:     7.48C: 59.14 H: 6.44 N: 3.35 S: 7.15 (KBr)3420, 3270, 2660, 1704,1602,     1526, 1165, 1091. 1.08˜2.13(m, 15H), 2.23(t, J=7Hz, 2H), 3.00(m,     1H),5.17(m, 2H), 7.48(A.sub.2 B.sub.2 q-Apart, J=8Hz, 2H),7.76(A.sub.2     B.sub.2 q-Bpart, J=8Hz, 2H ).      38 Na     ##STR64##       C.sub.21 H.sub.25 NO.sub.6 SNa.sub.2.1.5H.sub.2 OC: 51.21 H: 5.73 N:     2.84 S: 6.51C: 51.31 H: 5.75 N: 2.98 S: 6.42 (KBr)3420, 3295, 1600,      1     1560,427sh, 1402, 1161,1090. 1.05˜2.64(m, 17H), 3.43(m, 1H),     2.62(m, 2H),8.40(A.sub.2 B.sub.2 q-Apart, J=8Hz, 2H), 8.50(A.sub.2     B.sub.2 q-Bpart, J= 8Hz, 2H).      39 Na     ##STR65##       C.sub.20 H.sub.26 NO.sub.6 SNa.0.8H.sub.2 OC: 55.88 H: 6.47 N: 3.26 S:     7.46Na: 5.35C: 55.84 H: 6.39 N: 3.30 S: 7.45Na: 5.32 (KBr)3380br, 3270,     1588,1555, 1500, 1150, 1091. (D.sub.2 O+EXT.TMS): 1.45˜2.67(m,     17H), 3.27(m,1H), 5.62(m, 2H), 7.45(A.sub.2 B.sub.2 q-Apart, J=8Hz,2H),     8.1 7(A.sub.2 B.sub.2 q-Bpart, J=8Hz, 2H).      40 Na     ##STR66##       C.sub.20 H.sub.26 FNO.sub.4 SNa.0.5H.sub.2 OC: 56.59 H: 6.17 F: 4.48     N: 3.30S: 7.55 Na: 5.42C: 56.67 H: 5.97 F: 4.55 N: 3.29S: 7.79 Na: 5.75     (KBr)3420, 3282, 1591, 1562,1495, 1169, 1153, 1093. (D.sub.2 O+EXT.TMS):     1.46˜2.65(m, 17H), 3.36(m,1H), 5.64(m, 2H), 7.22(m, 2H).  41     CH.sub.3      ##STR67##       C.sub.22 H.sub.31 NO.sub.4 S.0.8H.sub.2 OC: 62.92 H: 7.82 N: 3.34 S:     7.64C: 63.02 H: 7.60 N: 3.38 S: 7.28 (CHCl.sub.3)3395, 3300, 1731,     1603,1154, 1098, 1088. (CDCl.sub.3): 0.77˜2.02(m, 15H), 2.27(t,     J=7Hz,2H), 2.42(s, 3H), 2.99(m, 1H), 3.67(s, 3H),5.23(m, 3H), 7.36(m,     2H), 7.72(m, 2H).      42 Na     ##STR68##       C.sub.21 H.sub.28 NO.sub.4 SNa.1.2H.sub.2 OC: 57.96 H: 7.04 N: 3.22 S:     7.37Na: 5.28C: 57.88 H: 6.72 N: 3.23 S: 7.32Na: 5.34 (KBr)3430, 3280,     1562, 1409,1321, 1303, 1153, 1097,1088. (D-methanol): 1.08˜2.18(m,     17H), 2.42(s,3H), 2.90(m, 1H), 5.14(m, 2H), 7.40(m, 2H),7.69(m, 2H).  43     H      ##STR69##       C.sub.20 H.sub.26 NO.sub.4 SNa.0.5H.sub.2 OC: 58.80 H: 6.66 N: 3.43 S:     7.85Na: 5.63C: 58.82 H: 6.59 N: 3.45 S: 7.74Na: 5.86 (KBr)3420, 3280,     1561, 1446,1410, 1318, 1154, 1092. (D.sub.2      O+EXT.TMS): 1.07˜2.61(m, 17H), 3.35(m,1H), 5.60(m, 2H), 8.27(m,     3H), 8.33(m, 2H),[[α].sub.D +14.3±0.5(24°      C.C=1.012%CH.sub.3      OH)]     ##STR70##

Anal. Calcd. (%) for C₂₁ H₂₈ NO₄ SCl.0.1C₆ H₆ : C: 59.80 H: 6.65 N: 3.23S: 7.39 Cl: 8.17 Found (%): C: 59.70 H: 6.60 N: 3.24 S: 7.02 Cl: 8.33.

IRνmax (CHCl₃) cm⁻¹ : 3400, 3290, 1733, 1590, 1578, 1164, 1098, 1089.

NMR δ ppm (CDCl₃): 0.95-2.18(m,15H), 2.29(t,J=7 Hz, 2H), 3.00(m, 1H),3.69(s,3H), 5.02(d,J=7 Hz, 1H), 5.28(m,2H), 7.49(A₂ B₂ q, Apart,J=10 Hz,2H), 7.84(A₂ B₂ q, Bpart,J=10 Hz,2H). ##STR71##

Anal. Calcd. (%) for C₂₀ H₂₆ NO₄ SClNa.0.5H₂ O: C: 54.23 H: 5.92 N: 3.16S: 7.24 Cl: 8.01 Na: 5.19 Found (%): C: 54.45 H: 6.04 N: 3.25 S: 6.90Cl: 7.89 Na: 5.13.

IRνmax (KBr) cm⁻¹ : 3410 br, 1640, 1560, 1160, 1196, 1086.

NMR δ ppm (d-Methanol): 1.10-2.22(m,17H), 2.94(m,1H), 5.20(m, 2H),7.57(A₂ B₂ q,Apart,J=10 Hz, 2H), 7.86(A₂ B₂ q,Bpart, J=10 Hz, 2H).##STR72##

Anal. Calcd. (%) for C₂₂ H₃₁ NO₄ S.0.12C₆ H₆ : C: 65.76 H: 7.71 N: 3.38S: 7.73 Found (%): C: 65.59 H: 7.68 N: 2.86 S: 7.41.

IRνmax (CHCl₃) cm⁻¹ : 3390, 1730, 1150, 1126.

NMR δ ppm (CDCl₃): 0.81-2.10(m,15H), 2.30(t,J=7 Hz, 2H), 3.18(m, 1H),3.63(s,3H), 4.20(s,2H), 4.84(d,J=7 Hz, 1H), 5.40(m,2H), 7.39(s,5H).##STR73##

NMR δ ppm (CDCl₃): 0.89-2.41(m,17H), 3.17(m,1H), 4.20(s,2H), 5.04(d,J=7Hz, 1H), 5.39(m,2H), 7.39(s,5H), 10.18(brs, 1H). ##STR74##

Anal. Calcd. (%) for C₂₁ H₂₈ NO₄ SNa.0.4H₂ O: C: 59.95 H: 6.90 N: 3.33S: 7.62 Na: 5.46 Found (%): C: 60.18 H: 6.89 N: 3.29 S: 7.51 Na: 5.31.

IRνmax (KBr) cm⁻¹ : 3405, 3280, 1561, 1430 sh, 1411, 1316, 1150, 1125.

NMR δ ppm (CDCl₃): 0.95-2.30(m,17H), 3.09(m,1H), 4.20(s,2H), 5.37(m,2H), 7.32(s, 5H). ##STR75##

Anal. Calcd. (%) for C₂₃ H₃₃ NO₄ S: C: 65.84 H: 7.93 N: 3.34 S: 7.64Found (%): C: 65.90 H: 7.84 N: 3.38 S: 7.38.

IRνmax (CHCl₃) cm⁻¹ : 3390, 3295, 1730, 1604, 1498, 1144, 1072, 1054.

NMR δ ppm (CDCl₃): 1.02-2.09(m,15H), 2.29(t,J=7 Hz, 2H), 3.20(m, 5H),3.65(s,3H), 4.94(d,J=7 Hz, 1H), 5.37(m,2H), 7.24(m,5H). ##STR76##

Anal. Calcd. (%) for C₂₂ H₃₀ NO₄ SNa.0.3H₂ O: C: 61.03 H: 7.12 N: 3.24S: 7.41 Na: 5.31 Found (%) C: 60.97 H: 7.06 N: 3.37 S: 7.46 Na: 5.62.

IRνmax (KBr) cm⁻¹ : 3425, 3295, 1562, 1455, 1499.5 1407, 1312, 1146,1080, 1059.

NMR δ ppm (d-Methanol): 1.15-2.32(m,17H), 3.19(m,5H), 5.38(m, 2H),7.25(s,5H). ##STR77##

Anal. Calcd. (%) for C₂₅ H₃₁ NO₄ S.0.1H₂ O: C: 67.72 H: 7.09 N: 3.16 S:7.23 Found (%): C: 67.64 H: 6.88 N: 3.04 S: 6.93.

IRνmax(CDCl₃) cm⁻¹ : 3395, 1732, 1156, 1132, 1076.

NMR δ ppm (CDCl₃): 1.05-2.23(m,17H), 3.05(m,1H), 3.65(s,3H), 5.10(m,2H),5.64(d,J=7 Hz, 1H), 7.60(m,2H), 7.97(m, 4H), 8.50(s, 1H). ##STR78##

Anal. Calcd. (%) for C₂₄ H₂₈ NO₄ SNa.0.4H₂ O: C: 63.11 H: 6.36 N: 3.07S: 7.02 Na: 5.03 Found (%): C: 63.18 H: 6.27 N: 3.20 S: 6.83 Na: 4.96.

IRνmax (KBr) cm⁻¹ : 3360, 3285, 1562, 1407, 1316, 1153, 1130, 1075.

NMR δ ppm (d-MeOH): 1.03-2.20(m,17H), 2.97(m,1H), 5.02(m,2H),7.64(m,2H), 8.00(m,4H), 8.43(s,1H). ##STR79##

Anal. Calcd. (%) for C₂₀ H₂₈ N₂ O₄ S.1/10C₆ H₆ : C: 61.97 H: 7.17 N:6.97 S: 7.97 Found (%): C: 61.71 H: 7.30 N: 6.80 S: 7.76.

IRνmax (CHCl₃) cm⁻¹ : 3390, 3290, 1730, 1577, 1168, 1107.

NMR δ ppm (CDCl₃): 1.02-2.26(m,15H), 2.27(t,J=7.0 Hz, 2H), 3.03(m, 1H),3.65(s,3H), 5.22(m,2H), 5.87(d,J=7.0 Hz, 1H), 7.44(m,1H), 8.17(m,1H),8.78(m,1H), 9.09(m,1H). ##STR80##

NMR δ ppm (CDCl₃): 1.02-2.22(m,15H), 2.33(t,J=7 Hz, 2H), 3.05(m, 1H),5.23(m, 2H), 5.94(d,J=7 Hz, 1H), 7.51(d.d,J=5 Hz, 8 Hz, 1H), 8.25(m,1H),8.85(m,1H), 9.17(brs,1H), 9.73(brs, 1H). ##STR81##

Anal. Calcd. (%) for C₁₉ H₂₅ N₂ O₄ SNa.0.03H₂ O: C: 56.90 H: 6.30 N:6.99 S: 8.00 Found (%): C: 57.07 H: 6.38 N: 7.07 S: 8.15.

IR νmax (KBr) cm⁻¹ : 3420, 3260, 3080, 1698, 1570, 1413, 1320, 1166,1106.

NMR δ ppm (d-MeoH): 1.12-2.16(m,15H), 2.14(t,J=7 Hz, 2H), 2.97(m, ppm1H), 5.14(m,2H), 7.10(d,d,J=5 Hz, 8 Hz, 1H), 8.25(m,1H), 8.76(m,1H),8.99(brs,1H).

EXAMPLE 30 Sodium7-[2(S*)-2-exo-3-endo-3-benzenesulfonaimidobicyclo[2.2.1]hept-2-yl]-5-heptanoateI a1-ac(2S*-t) ##STR82##

Compound 12a (200 mg) in methanol (5 ml) is hydrogenated on 10%palladium-carbon (700 mg) in hydrogen atmosphere for 20 minutes. Afterremoved of the catalyst by filtration, the filtrate is freeze-dried togive I a1-ac(2S*-t) as a colorless powder (189 mg).

Anal. Calcd. (%) for C₂₀ H₂₈ NO₄ SNa, 0.7H₂ O: C, 58.00; H, 7.16; N,3.38; S, 7.74; Found (%): C, 58.12; H, 7.02; N, 3.49; S, 7.57.

IR(KBr) νmax: 3400, 3270, 1564, 1488, 1412, 1322, 1156 cm⁻¹.

¹ H-NMR(D₂ O+EXT-TMS) δ ppm: 1.5-2.67(m,21H), 3.30(m,1H), 8.07(m,3H),8.63(m,2H).

EXAMPLE 31 ##STR83##

(1) Preparation of II a6(2S*-t)

Sodium hydride (2.43 g, 60% purity, 60.9 mM) was suspended in 74 ml ofdry DMSO at room temperature. The mixture was heated at 75° C. for 50minutes under stirring, cooled with ice-water to 15° C.

To the solution was added 13.03 g of 2-carboxyethyltriphenylphosphoniumbromide (32.8 mM) at 15° C. The mixture was stirred for 10 minutes atthe same temperature. A solution of aldehyde 7a, prepared in I-1,Example 5 (3.24 g, 11.28 mM) in dry DMSO (14 ml) was added to thesolution, which was stirred for 1.5 hours at room temperature andpartitioned between ethyl acetate and 1N-HCl. The organic solution waswashed with water, dried over magnesium sulfate and concentrated invacuo. The residue was chromatographed on silica gel (elution with ethylacetate) to afford oily product, which was treated with diazomethane inether. Separation by chromatography on silica gel (elution with 20%ethyl acetate in n-hexane) afforded oily product II a6(2S*-t) (2.47 g,61.3%).

IRνmax (CHCl₃) cm⁻¹ : 3445, 1720.

NMR δ ppm (CDCl₃): 0.90-2.40(m,11H), 3.05(m,2H), 3.47(m, 1H),3.63(s,3H), 4.88(m,1H), 5.06(s,2H), 5.54(m, 2H), 7.33(s,5H).

(2) Preparation of I a6-aa(2S*-t)

A solution of II a6(2S*-t) (1.27 g, 3.55 mM) in 5 ml of anisole and 20ml of trifluoroacetic acid was stirred for 4 hours at 45° C. Thereaction mixture was concentrated in vacuo and rinsed with n-hexane togive a oily residue. To a solution of the oily residue indichloromethane (10 ml), triethylamine (2.24 ml, 8.9 mM) andbenzenesulfonyl chloride (0.68 ml, 5.3 mM) were added under stirring at-20° C. After stirring for 30 minutes at the same temperature, thereaction mixture was partitioned between ethyl acetate and 1N-HCl.

The organic solution was washed with 5% aqueous sodium bicarbonatesolution, water, dried over magnesium sulfate and concentrated in vacuo.The residue was chromatographed on silica gel (elution with 20% ethylacetate in n-hexane) to afford I a6-aa(2S*-t) (804 mg, 62.5%).

Anal. Calcd. for (%) C₁₉ H₂₆ NO₄ S: C: 62.78 H: 6.93 N: 3.85 S: 8.82Found (%): C: 62.62 H: 6.97 N: 3.72 S: 8.70.

IRνmax (CHCl₃) cm⁻¹ : 3390, 3280, 1733, 1160, 1093.

NMR δ ppm (CDCl₃): 0.85-2.00(m,10H), 2.18(brs,1H), 2.94(d, J=7 Hz, 2H),2.98(m,1H), 3.68(s,3H), 5.01(d,J=7 Hz, 1H), 5.27-5.58(m,2H),7.43-7.61(m,3H), 7.82-7.95(m, 2H).

(3) Preparation of I a6-ac(2S*-t)

Methyl ester I a6-aa(2S*-t) was saponified and freeze-dried by the usualmethod to give I a6-ac(2S*-t).

Anal. Calcd. (%) for C₁₈ H₂₂ NO₄ SNa.0.8H₂ O: C: 56.03 H: 6.17 N: 3.63S: 8.31 Found (%): C: 55.86 H: 6.04 N: 3.57 S: 8.36.

IRνmax (KBr) cm⁻¹ : 3400 br, 3280, 1630 sh, 1565, 1448, 1400sh, 1388,1318, 1157, 1093.

NMR δ ppm (D₂ O-EXT.TMS): 1.48-2.50(m,11H), 3.22(m,3H), 5.73(m,2H),8.03(m,3H), 8.30(m,2H).

EXAMPLES 32 TO 35

The following compounds, shown in Table 2, were prepared from thecompound 44 in accordance with the manner of Example 31 (2) and (3).

                  TABLE 2                                                         ______________________________________                                        R.sub.2     .sup.1 HNMR (CDCl.sub.3): δ ppm                             ______________________________________                                         ##STR84##                                                                     ##STR85##  0.85˜2.05(m, 10H), 2.16(brs, 1H), 2.96 (d, J=7Hz, 2H),                  3.00(m, 1H), 3.68(s, 3H), 5.14(d, J=7Hz, 1H),                                 5.20˜5.65(m, 2H), 7.46(A.sub.2 B.sub.2 type, Apart,                     J=8Hz, 2H), 7.82(A.sub.2 B.sub.2 type, Bpart, J=8Hz, 2H)           ##STR86##  0.80˜2.00(m, 10H), 2.16(brs, 1H), 2.41 (s, 3H), 2.92(d,                 J=7Hz, 2H), 2.96(m, 1H), 3.66(s, 3H), 5.17(d, J=7Ha, 1H),                     5.23˜5.55(m, 2H), 7.29(A.sub.2 B.sub.2 type, Apart,                     J=8Hz, 2H), 7.75(A.sub.2 B.sub.2 type, Bpart, J=8Hz, 2H)           ##STR87##  0.86˜2.06(m, 10H), 2.15(brs, 1H), 2.96 (d, J=7Hz, 2H),                  2.98(m, 1H), 3.67(s, 3H), 5.18˜5.54 (m, 2H), 5.56(d,                    J=7Hz,  1H), 7.08˜7.30(m, 2H), 7.84˜9.03(m, 2H)        ##STR88##  0.86˜2.02(m, 10H), 2.16(brs, 1H), 2.32 (s, 3H), 2.96(d,                 J=7Hz, 2H), 2.97(m, 1H), 3.67(s, 3H), 5.17˜5.60(m, 2H),                 5.61 (d, J=7Hz, 1H), 7.25(A.sub.2 B.sub.2 type, Apart, J=8Hz,                 2Hz), 7.93(A.sub.2 B.sub.2 type, Bpart, J=8Hz, 2H)                 ##STR89##                                                                     ##STR90##  0.90˜2.05(m, 10H), 2.13(brs, 1H), 2.80˜3.15(m,                    3H), 5.20˜5.65(m, 2H), 5.54 (d, J=8Hz, 1H),                             7.46(A.sub.2 B.sub.2 type, Apart, J=8Hz, 2H), 7.81 (A.sub.2                   B.sub.2 type, Bpart, 2H), 9.20(brs, 1H)                            ##STR91##  0.85˜2.00 (m, 10H), 2.16(brs, 1H), 2.41 (s, 3H),                        2.80˜3.200(m, 3H), 5.15˜5.63(m, 3H), 7.27(A.sub.2                 B.sub.2 type, Apart, J=8Hz, 2H), 7.77(A.sub.2 B.sub.2 type,                   Bpart, J=8Hz, 2H),                                                            9.31(brs, 1H)                                                      ##STR92##  0.88˜2.03(m, 10H), 2.16(brs, 1H), 2.90˜3.18(m,                    3H), 5.18(d, J=7Hz, 1H), 5.25˜5.65(m, 2H), 6.59(brs,                    1H), 7.09˜7.28(m, 2H), 7.82˜7.98(m, 2H)                ##STR93##  0.98˜2.00(m, 10H), 2.13(brs, 1H), 2.80˜3.13(m,                    3H), 5.25˜5.62(m, 2H), 6.91 (A.sub.2 B.sub.2 type,                      Apart, J=8Hz, 2H), 7.73 (A.sub.2 B.sub.2 type, Bpart, J=8Hz,                  2H)                                                               ______________________________________                                    

EXAMPLES 36 AND 37

The following compounds are prepared from the aldehyde, prepared in I-2,Example 40 (2), by reacting with 3-methoxycarbonylbenzyltriphenylphosphonium bromide in the same manner as I-1, Example 31.##STR94##

1 R₁ ═CH₃

Anal. Calcd. (%) for C₂₄ H₂₇ NO₄ S.0.1H₂ O C: 67.45 H: 6.42 N: 3.28 S:7.50 Found (%): C: 67.34 H: 6.46 N: 3.34 S: 7.34.

IRνmax (CHCl₃) cm⁻¹ : 3400, 3285, 1605, 1584, 1165, 1095.

NMR δ ppm (CDCl₃): 1.05-2.13(m,11H), 3.05(m,1H), 3.92(s,3H),5.27-5.70(m,2H), 6.30(d,J=11.5 Hz,1H), 7.40(m,5H), 7.90(m,4H).

R₁ : H

mp. 160°-162° C.

Anal. Calcd. (%) for C₂₃ H₂₆ NO₄ S.0.1H₂ O C: 67.13 H: 6.12 N: 3.40 S:7.79 Found (%): C: 66.92 H: 6.24 N: 3.34 S: 7.64.

IRνmax (KBr) cm⁻¹ : 3435, 3270, 2605, 2560, 1688, 1607, 1581, 1158, 1093

NMR δ ppm (CDCl₃): 1.03-2.25(m,11H), 3.05(m,1H), 4.97(d, J=7 Hz, 1H),5.50(t of d J=7 Hz, 11.5 Hz,1H), 6.20(br, 1H), 6.33(d,J=11.5 Hz,1H),7.47(m,5H), 7.90(m,4H).

EXAMPLE 37 ##STR95##

R₁ ; CH₃

Anal. Calcd. (%) for C₂₄ H₂₇ NO₄ S.0.1H₂ O C: 67.45 H: 6.42 N: 3.28 S:7.50. Found (%): C: 67.41 H: 6.56 N: 3.22.

IRνmax (CHCl₃) cm⁻¹ : 3390, 3280, 1720, 1601, 1583, 1161, 1093, 965.

NMR δ ppm (CDCl₃): 1.08-2.16(m,11H), 3.08(m,1H), 3.92(s,3H), 5.46(d,J=7Hz,1H), 5.90-6.36(m,2H), 7.49(m,5H), 7.90(m,4H).

R₁ ; Na

Anal. Calcd. (%) for C₂₃ H₂₄ NO₄ SNa.0.1H₂ O C: 61.18 H: 5.80 N: 3.10 S:7.10 Na: 5.09. Found (%): C: 61.38 H: 5.83 N: 3.10 S: 7.36 Na: 4.69.

IRνmax (KBr) cm⁻¹ : 3425, 3285, 1608, 1590, 1560, 1449, 1430, 1390,1163, 1156, 1095, 967.

NMR δ ppm (d-MeoH): 1.12-2.18(m,11H), 3.00(m,1H), 6.15(m,2H),7.23-7.90(m,9H).

I-1 EXAMPLE 38

In the same manner as I-7, Example 47 the following compounds Ic areprepared from norborn-5-ene-2,3-dicarboxylic anhydride [Aldrich].

    ______________________________________                                         ##STR96##                                                                    R.sub.1                                                                             Appearance Physical Constants                                           ______________________________________                                        CH.sub.3                                                                            Colorless  .sup.1 HNMR (CDCl.sub.3) : δ 2.27 (t,J=7Hz,2H),              oil        2.46 (br.s,1h), 2.71 (br.s,1H), 3.32                                          (td,J=4,9Hz,1H), 3.65 (s,3H), 4.52 (d,                                        J=9Hz,1H), 5.05-5.45 (M,2H), 5.80-6.40                                        (m,2H), 7.40-8.05 (m,5H). Anal. Calcd.                                        for C.sub.21 H.sub.27 NO.sub.4 S.H.sub.2 O : C; 61.88,                        H; 7.18,                                                                      N; 3.44,s; 7.87. Found : C; 61.86, H;                                         6.86, N; 3.22, S; 7.74.                                      H                .sup.1 HNMR (CDCl.sub.3) : δ 0.85-2.25 (m,(H),                          2.32 (t,J=7Hz,2H) 2.45 (br.s,1H), 2.70                                        (br.s,1H), 3.32 (td,J=9Hz,1H), 4.71 (d,                                       J=9Hz,1H), 5.08-5.43 (m,2H),5.80-6.40                                         (m,2H), 7.43-8.00 (m,5H), 8.50 (3br.s,                                        1H). Anal. Calcd. for C.sub.20 H.sub.25 NO.sub.4 S : C;                       63.96, H: 6.72, N; 3.73, s; 8.54. Found:                                      C; 64.23, H; 6.86, N; 3.64, S; 8.36.                         Na    Colorless                                                                     power                                                                   ______________________________________                                    

I-1 EXAMPLE 39

In the same manner as I-1, Example 1 to 14 the following compounds Idare prepared from (-)-camphor[Aldrich].

    ______________________________________                                         ##STR97##                                                                    [The configuration at each asymmetric centers of (-)-camphor                  are retained in the final product.]                                           R.sub.1                                                                             Appearance Physical Constants                                           ______________________________________                                        CH.sub.3                                                                            Colorless  .sup.1 HNMR (CDCl.sub.3) : δ 0.71 (s,3H), 0.80                          (s,                                                                gum        3H), 0.88 (s,3H), 2.27 (t,J=7Hz,2H),                                          2.58 (dd,J=5, 9Hz,1H), 3.68 (s,3H), 5.01                                      (d,J=9Hz, 1H), 5.05-5.25 (m,2H), 7.40-                                        8.05 (m,5H). Anal. Calcd. for                                                 C.sub.24 H.sub.35 NO.sub.4 S : C; 66.47, H; 8.15, N;                          3.23,                                                                         S; 7.39. Found : C; 66.27, H; 8.06, N;                                        3.22, S; 7.15                                                H     Colorless  .sup.1 HNMR (CDCl.sub.3): δ 0.71 (s,3H), 0.79                gum        (s,3H), 0.87 (s,3H), 2.31 (t,J=7Hz,2H),                                       2.58(dd,J=5, 9Hz,1H), 5.17 (d,J=9Hz,1H),                                      4.95-5.40 (m,2H), 7.40-8.10 (m,5H), 9.36                                      (br.s,1H), Anal. Calcd. for C.sub.23 H.sub.33 NO.sub.4 S                      :                                                                             C; 65.83, H; 7.94, N; 3.34, S; 7.64.                                          Found : C; 65.49, H; 7.76, N; 3.41, S;                                        7.37.                                                        Na    Colorless                                                                     powder                                                                  ______________________________________                                    

I-2 EXAMPLE 40

(1) Preparation of 5b ##STR98##

A solution of 2.85 g (10 mM) of compound 5a, prepared in I-1 Example 3,in anisole (10 ml) and trifluoroacetic acid (30 ml) was stirred for 4hours at 45° C. The reaction mixture was concentrated in vacuo. To asolution of the residue in 30 ml of CH₂ Cl₂, triethylamine (4.18 ml; 10mM×3) and benzenesulfonyl chloride (1.90 ml; 10 mM×1.5) were added at 0°C.

The mixture was stirred for 30 min at 0° C., partitioned between AcOEtand 1NHCl. The AcOEt solution was washed with water, dried over Na₂ SO₄and concentrated in vacuo. Separation of the residue by columnchromatography [SiO₂ 50 g, eluted with 10% AcOEt in n.hexane] gave 1.89g (65%) of compound 5b as colorless prisms. mp 84°-87° C. IRνmax (CHCl₃)(cm⁻¹): 3395, 3285, 1642, 1449, 1157, 1094. ¹ HNMR(CDCl₃): δ ppm1.00-2.15(m,11H), 3.02(m,1H), 4.78(m,2H), 5.50(m,2H), 7.55(m,3H),7.93(m,2H)

(2) Preparation of 7b ##STR99##

To a solution of compound 5b (1.00 g, 3.43 mM) in 15 ml of CH₂ Cl₂, wasadded m-chloroperbenzoic acid (purity 80%; 1.48 g, 6.86 mM) at 0° C. Themixture was stirred for 2.5 hours at 25° C., washed with 10% aqueoussodium thiosulfate and 5% aqueous sodium bicarbonate. The organicsolution was concentrated in vacuo and gave the crude epoxide. To asolution of the epoxide in 22 ml of dioxane, periodic acid (1.56 g; 6.86mM) and 4 ml of water were added at 25° C. The mixture was stirred for 3hours at 25° C., poured into water and extracted with AcOEt. The AcOEtsolution was washed with water, dried over Na₂ SO₄, concentrated invacuo and gave 1.00 g (100%) of compound 7b as a colorless oil. ¹ H-NMR(CDCl₃): δ ppm 1.25-2.35 (m, 11H), 2.85(m,1H), 5.68(d,J=10 Hz,1H),7.45(m,3H), 7.83(m,2H), 9.52(s,1H).

(3) Preparation of2(S*)-2-exo-3-endo-(2-trimethylsilyloxy)vinyl-3-benzenesulfonamidobicyclo[2.2.1]heptaneIII a2'(2S*-t). ##STR100##

Trimethylsilylation of 7b was conveniently achieved as follows. Into thewell stirred solution of trimethylsilyl chloride (1.13 g, 9 mmol) indichloromethane (8 ml) was quickly added trimethylamine (1.25 ml, 9mmol) at 0° C. Complex formation was completed within 10 minuits. Then,the aldehyde 7b (852 mg, 2.93 mmol) dissolved in 1.5 ml ofdichloromethane was added dropwise to this mixture over 5 minuits. Thereaction temperature was gradually raised to room temperature and themixture was kept well stirred overnight to effect the progress of thereaction, as precipitation of triethylamine hydrochloride made thereaction heterogeneous. After nmr spectroscopic confirmation of theentire consumption of 7b, the solvent was completely evaporated underreduced pressure to leave an crude solid mixture. The mixture wasrepeatedly trituated with dry pentane to separate the desired enoltrimethylsilyl ether from triethylamine hydrochloride. Evaporation ofpentane from the organic layer gave an nearly pure crystalline residue(915 mg, 86%) of the desired product III a2'(2S*-t). As III a2'(2S*-t)was easily hydrolyzed in an aqueous work-up or column chromatography, itwas used for the subsequent reaction without further purification.

NMR: δ ppm (CDCl₃) 0.13-0.17(two s, 9H), 1.0-2.35(m,9H), 3.03(m,1H),4.28(dd,J=6 Hz, J=9 Hz,1H), 4.95(m,1H), 5.97(dd, J=6 Hz, J=1.5 Hz,1H),7.43-7.63(m,3H), 7.77-7.97(m,2H).

(4) Preparation of2(S*)-2-exo-3-endo-2-formylfluoromethyl-3-bensenesulfonamidobicyclo[2.2.1] heptane III a2(2S*-t) ##STR101##

Into the well stirred solution of III a'2(2S*-t) (365 mg, 1 mmol) ineither dichloromethane or acetonitrile (1.5 ml) was added all at oncecrystalline xenon fluoride (253 mg, 1.48 mmol) at 0° C. After a shortinduction period, the reaction started smoothly with the evolution ofgaseous xenon. As the gas evolution weakened, the temperature was raisedto room temperature and maintained for 2 hours to complete the reaction.Then, the resulting pale yellow solution was poured into cold water andextracted three times with ethyl acetate. The organic layer was driedover magnesium sulfate and evaporated under reduced pressure to leave anoily residue. The nmr spectrum of this residue showed two characteristicaldehyde signals which appeared in the same intensity at δ9.51 and 9.68with vicinal F-H coupling constants 5.8 Hz and 6.5 Hz, respectively,clearly suggesting the formation of the desired fluorinated aldehyde astwo isomeric mixtures. Thus formed fluorinated aldehyde was separatedfrom other minor by-products such as the compound III a'2 (2S*-t) andother unidentified ones by silica gel column chromatography usingtoluene-ethyl acetate mixture as an eluent to afford the oily aldehydeIII a2(2S*-t) (132 mg, 45%). The structure of III a2(2S*-t) was clearlyproved by 19F-nmr spectrum as shown below.

19F-NMR: δ from C₅ F₆ (CDCl₃) +31 ppm (dm,J=43 Hz) and +38 ppm(Oct.,J=43 Hz, J=26 Hz, J=6 Hz).

(5) Preparation of methyl7-[2(S*)-2-exo-3-endo-3-benzenesulfonamidobicyclo[2.2.1]heptan-2-yl]-(5Z)-7-fluoro-5-pentenoateI a2-aa(2S*-t) ##STR102##

The ylide required for this Wittig reaction was prepared according tothe well known Corey's method as follows.

Under the nitrogen atmosphere, sodium hydride dispersion (60% oil: 138mg, 3.4 mmol) was, in sequence, washed with dry pentane, then driedfollowed by addition of dimethylsulfoxide (3.6 ml), and finallycompletely dissolved into dimethylsulfoxide at 60°-70° C. to afford thepale yellow solution of methylsulfinyl carbanion. This solution wascooled to 12° C. and then the commercially available 5-(methylpentenoate)-triphenylphosphonium bromide (846 mg, 1.9 mmol) dissolved indimethylsulfoxide (3.6 ml) was quickly added. Then, the temperature wasgradually raised to room temperature and maintained for 20 minutes toeffect the ylide formation. The color of the solution turned to be quitereddish brown from pale yellow as ylide was formed. Then, fluorinatedaldehyde (175 mg, 0.6 mmol) dissolved in 1.5 ml of DMSO was added intothis ylide solution maintained at 12° C. in a few minutes and thetemperature was gradually raised to room temperature. The color of thesolution was immediately faded away along with the addition of thealdehyde. After 30 minutes, the reaction mixture was poured into coldsaturated saline acidified with hydrochloric acid and extracted withethyl acetate. DMSO was completely-washed out from the organic extractby cold water. The organic layer was then dried over magnesium sulfate,filtered, and evaporated solvent under reduced pressure to leave an oilyresidue. This residue was again dissolved into tetrahydrofuran withoutpurification and esterified with diazomethane. After evaporation ofsolvents the desired title compound (105 mg, 43%) was easily separatedfrom the resulting product mixture by silica gel column chromatographyusing toluene-ethyl acetate as an eluent. The compounds wascharacterized as follows and identified as the desired one.

NMR: δ ppm (CDCl₃); 1.0-2.4(m,15H), 3.0-3.5(m,1H), 3.6-3.8(two s, 3H),4.0-5.0(m,1H), 5.0-5.8(m,3H), 7.40-7.70(m, 3H), 7.80-8.10(m,2H).

IR: νmax (CHCl₃); 3600, 3375, 2950, 1730, 1580, 1440, 1320, 1160, 1095cm⁻¹.

Mass (m/e): 409 (M⁺), 389, 377, 358, 320, 315, 268, 248, 232, 91, 77etc.

I-3a EXAMPLE 41

(1) Preparation of I a3-aa(2S*-t) ##STR103##

A mixture of 400 mg (1.38 mM) of 5b, prepared in I-2, Example 40, andmethyl 3-mercaptopropionate (824 mg, 6.9 mM) was heated at 60° C.overnight with stirring in the presence of azoisobutylonitrile (30 mg).

The mixture was diluted with ethyl acetate, washed with 5% aqueoussodium carbonate solution, water, dried over magnesium sulfate, andconcentrated in vacuo. Separation by chromatography on silica gel(elution with 20% ethyl acetate in n-hexane) afforded oil I a3-aa(2S*-t)(236 mg, 41.6%).

Anal. Calcd. (%) for C₂₀ H₂₉ NO₄ S₂.0.2H₂ O: C: 57.85 H: 7.14 N: 3.37 S:15.45. Found (%): C: 57.86 H: 6.97 N: 3.47 S: 15.28.

IRνmax (CHCl₃) cm⁻¹ : 3390, 1736, 1159.5, 1092.

NMR δ ppm (CDCl₃): 1.00-2.64(m,19H), 3.02(m,1H), 3.70(s,3H), 5.58(d,J=7Hz,1H), 7.67(m,3H), 7.93(m,2H).

(2) Preparation of I a3-ca(2S*-t)

Saponification of the methyl ester I a3-aa(2S*-t) (225 mg), followed byfreeze-drying in the usual manner gave I a3-ca(2S*-t) (201 mg, 87%).

Anal. Calcd. (%) for C₁₉ H₂₆ NO₄ S₂ Na.0.6H₂ O: C: 53.03 H: 6.37 N: 3.26S: 14.90. Found (%): C: 53.14 H: 6.29 N: 3.37 S: 14.65.

IRνmax (KBr) cm⁻¹ : 3425, 3270, 1570, 1449, 1421, 1402, 1160, 1093.

NMR δ ppm (d-Methanol): 1.00-2.95(m,20H), 7.58(m,3H), 7.88(m, 2H).

I-3b EXAMPLE 42 ##STR104##

(1) Preparation of 45

To a solution of compound 7a, prepared from I-1, Example 5, 2.61 g (9.11mM) in 20 ml of ethanol, was added 378 mg of sodium borohydride (10 mM)at 0° C. The mixture was stirred for 30 minutes at 0° C., partitionedbetween AcOEt and 2NHCl. The organic solution was washed with water,dried over Na₂ SO₄, concentrated in vacuo. The crude alcohol waspurified by chromatography with silica gel [Merck Lobar B, eluted withn.hexane-AcOEt (25%)] and 1.6 g of compound 45 (Yield; 60.6%) wasobtained as a colorless gum.

¹ HNMR (CDCl₃): δ ppm 1.00-1.75(m,9H), 1.93(br.s,1H), 2.40(br.s, 1H),2.50(br.s,1H,0H), 2.50(m,1H), 2.59(t, J=7 Hz,2H), 5.05(s,2H),5.15(br.s,1H), 7.32(s, 5H). Anal. Calcd. (%) for C₁₇ H₂₃ NO₃ : C; 70.55,H; 8.03, N; 4.84. Found (%): C; 70.08, H; 7.99, N; 4.90.

(2) Preparation of 46.

To a solution of compound 46, 868 mg (3 mM) in 10 ml of CH₂ Cl₂, 572 mgof p-toluenesulfonyl chloride (3 mM) and 291 μl of pyridine (3 mM×1.2)were added at 0° C. The mixture was stirred for 3 h at 20° C. andallowed to stand overnight. The reaction mixture was partitioned betweenAcOEt and 0.1NHCl. The AcOEt layer was washed with water, dried over Na₂SO₄, concentrated in vacuo and separation by chromatography with silicagel [30 g, eluted with n.hexane-AcOEt (25%)] gave 946 mg of compound 46(Yield; 72.5%) as a colorless gum. ¹ HNMR (CDCl₃): δ ppm0.80-1.85(m,9H), 1.88(br.s, 1H), 2.38(br.s, 1H), 2.40(s,3H),3.41(td,J=4, 8 Hz,1H), 4.01(t, J=7 Hz,2H), 4.85(d,J= 8 Hz,1H),5.05(s,2H), 7.28(A₂ B₂ q, Apart, J=8 Hz,2H), 7.38(s,5H), 7.75(A₂ B₂ q,Bpart, J=8 Hz,2H).

Anal. Calcd. (%) for C₂₄ H₂₉ NO₅ S: C; 64.98, H; 6.60, N; 3.16, S; 7.23.Found (%): C; 65.11, H; 6.53, N; 3.31, S; 6.96.

(3) Preparation of II a4(2S*-t)

To a solution of 290 mg (1.08 mM×2) of methyl 4-mercaptobutyrate,prepared from ethyl 4-bromo-butyrate (H-L. Pan and T. L. Fletcher, Chem.& Ind. (London), 546, 1968), in 2 ml of methanol, was added a solutionof 4.51 ml of sodium methoxide (1.08 mM×2; 0.479 M/L in MeOH) at 0° C.The mixture was stirred for 15 min at 25° C., concentrated in vacuo,dissolved in 2 ml of DMF. The solution was added to a solution ofcompound 46, 480 mg (1.08 mM) in 4 ml of THF at 0° C. and the mixturewas stirred for 30 min at 25° C. The reaction mixture was partitionedbetween AcOEt and water and the organic layer was washed with water,dried over Na₂ SO₄ and concentrated in vacuo. Separation bychromatography on silica gel [30 g, eluted with n.hexane-AcOEt (10%)]gave 371 mg of compound II a4(2S*-t) as a colorless gum. ¹ HNMR (CDCl₃):δ ppm 0.95-2.10(m, 11H), 2.33-2.65(m,7H), 3.52(td,J=4, 8 Hz,1H),3.66(s,3H), 4.92(d,J=8 Hz, 1H), 5.09(s,2H), 7.36(s,5H). Anal. Calcd. (%)for C₂₂ H₃₁ NO₄ S: C; 65.14, H; 7.72, N; 3.45, S; 7.90. Found (%): C;65.02, H; 7.77, N; 3.38, S; 7.80.

(4) Preparation of I a4-aa(2S*-t)

500 mg of compound II a4(2S*-t) (1.23 mM) was dissolved in a mixture of1 ml of anisole and 5 ml of trifluoroacetic acid. The mixture wasstirred for 5 hours at 45° C., concentrated in vacuo. The residue wasdissolved in 10 ml of CH₂ Cl₂ and 512 μl of triethylamine (1.23 mM×3),235 μl of benzenesulfonyl chloride (1.23 mM×1.5) were added to thesolution at 0° C. The mixture was stirred for 15 minutes at 25° C.,partitioned between AcOEt and 0.1NHCl. The organic layer was washed withwater, dried over Na₂ SO₄ and concentrated in vacuo. Separation bychromatography on silica gel [30 g, eluted with n.hexane-AcOEt (20%)]gave 380 mg of compound I a4-aa(2S*-t) as a colorless gum. ¹ H-NMR(CDCl₃): δ ppm 0.90-2.60(m, 19H), 3.01(td, J=4, 7 Hz,1H), 3.69(s,3H),5.13(d, J=7 Hz,1H), 7.40-8.05(m, 5H). Anal. Calcd. (%) for C₂₀ H₂₉ NO₄S₂ : C; 58.35, H; 7.12, N; 3.40, S; 15.58. Found (%): C; 58.39, H; 7.15,N; 3.26, S; 15.35.

(5) Preparation of I a4-ba(2S*-t)

To a solution of compound I a4-aa(2S*-t), 360 mg (0.87 mM) in 5 ml ofmethanol, was added 1.74 ml of 1NKOH (0.87 mM×2) at 23° C. The mixturewas stirred for 8 hours at 23° C., partitioned between ether and water.The aqueous solution was acidified with 2NHCl, extracted with AcOEt. TheAcOEt solution was washed with water, dried over Na₂ SO₄, concentratedin vacuo, and gave 345 mg of compound I a4-ba(2S*-t) (89.6%) as acolorless gum. ¹ HNMR (CDCl₃): δ ppm 1.00-1.65(m,11H), 1.75-2.65(m,8H),3.02(td,J=4, 7 Hz, 1H), 5.38(d, J=7 Hz, 1H), 7.45-8.05(m,5H),8.80(br.s,1H). Anal. Calcd. (%) for C₁₉ H₂₇ NO₄ S₂.0.1C₅ H₆ : C; 58.07,H; 6.88 , N; 3.46 Found (%): C; 58.26, H; 6.92, N; 3.41.

(6) Preparation of I a4-ca(2S*-t)

To a solution of compound I a4-ba(2S*-t), 320 mg (0.72 mM) in 3 ml ofmethanol, was added a solution of 1.43 ml of sodium methoxide (0.72mM×0.95; 0.479 M/L in methanol) at 0° C. The mixture was stirred for 10minutes at 0° C., concentrated in vacuo. The residue was dissolved in 7ml of water and freeze-dried to afford 302 mg of compound I a4-ca(2S*-t)(100%) as a colorless powder.

I-4 EXAMPLE 43 ##STR105##

(1) Preparation of 1a

To a suspension of compound 1, 10.3 g (50 mM), prepared from p-hydroxycinnamic acid by acetylation, in 100 ml of acetone, 8.5 ml (50 mM×1.1)of diazabicycloundecene and 5.2 ml (50 mM×1.1) of dimethylsulfate wereadded at 0° C. The mixture was stirred for 30 minutes at 25° C.,partitioned between AcOEt and 0.2NHCl, and the organic solution waswashed with water, dried over Na₂ SO₄ and concentrated in vacuo to give8.00 g (Yield 72.7%) of compound 1a as crystalline powder. ¹ HNMR(CDCl₃): δ2.29(s,3H), 3.78(s,3H), 6.38(d, J=16 Hz,1H), 7.12(A₂ B₂type,Apart,J=10 Hz,2H), 7.53(A₂ B₂ type, Bpart, J=10 Hz,2H), 7.67(d,J=16Hz,1H).

(2) Preparation of 2

To a solution of 7.96 ml (36.3 mM×2) of titanium tetrachloride in 90 mlof CH₂ Cl₂, was added a solution of 21.61 ml (36.3 mM×2) of titaniumtetraisopropoxide in 60 ml of CH₂ Cl₂ at -30° C. Cyclopentadiene (9 ml,36.3 mM×3) and compound 1a (8.00 g, 36.3 mM) were added to the solutionand the mixture was stirred for 6 h at 0° C. The reaction mixture waspoured into ice water, extracted with CH₂ Cl₂. The CH₂ Cl₂ solution waswashed with water, dried over Na₂ SO₄ and concentrated in vacuo.Separation by column chromatography [SiO₂ 120 g, eluted with CH₂ Cl₂ ]gave the Diels-Alder adduct, which was hydrolysed as usual with 1N KOHand gave 460 mg (Yield 5.5%) of compound 2 as colorless prisms. Mp144°-146° C. ¹ HNMR (CDCl₃): δ1.40-1.85(m,2H), 2.85-3.15(m,3H),3.25(brs, 1H), 6.00(brs,1H), 6.05-6.55(m,2H), 6.75(A₂ B₂ type,Apart, J=9Hz, 2H), 7.18(A₂ B₂ type, Bpart,J=9 Hz,2H), 9.31(brs,1H).

(3) Preparation of 3

Compound 2, 450 mg (1.95 mM) was treated with diphenyldiazomethane asusual and the benzhydryl ester was treated with anhydrous potassiumcarbonate (538 mg, 1.95 mM×2) by refluxing in 10 ml of methyl ethylketone for 1 hour.

To the above suspension 203 μl (1.95 mM×1.1) of methyl bromoacetate and293 mg (1.95 mM) of sodium iodide were added and the mixture was stirredfor 4 hours under reflux. The reaction mixture was partitioned betweenAcOEt and water and the organic layer was washed with water, dried overNa₂ SO₄ and concentrated in vacuo. Separation of the residue bychromatography [SiO₂ 20 g, eluted with 25% AcOEt in n-hexane] gave 700mg (76.9%) of compound 3 as a colorless gum. ¹ HNMR (CDCl₃): δ ppm1.40-1.88(m,2H), 2.90-3.25(m,3H), 3.36(brs,1H), 3.78(s,3H), 4.59(s,2H),5.83-6.45(m,2H), 6.82(A₂ B₂ type,Apart,J=9 Hz,2H), 6.85(s,1H), 7.22(A₂B₂ type,Bpart, J=9 Hz,2H), 7.33(brs,10H).

(4) Preparation of II a5(2S*-t)

A mixture of 3(700 mg, 1.49 mM), anisole (1.4 ml), trifluoroacetic acid(1.4 ml) in 14 ml of CH₂ Cl₂ was stirred for 30 minutes at 0° C. andconcentrated in vacuo to remove trifluoroacetic acid. The residue wastreated with triethylamine (296 μl, 1.49 mM×3) and ethyl-chloroformate(185 μl, 1.49 mM×1.3) in 10 ml of acetone and 2 ml of water for 20 minat 0° C. To the mixture was added a solution of 145 mg (1.49 mM×1.5) ofsodium azide in 3 ml of water. The reaction mixture was stirred for 30minutes at 0° C. and partitioned between AcOEt and 0.1NHCl. The organiclayer was washed with water, dried over Na₂ SO₄ and concentrated invacuo. A solution of the residue in 6 ml of benzene was stirred for 30minutes under gentle reflux. After evolution of nitrogen, benzyl alcohol(309 μl, 1.49 mM×2) and triethylamine (269 μl, 1.49 mM×1.3) were addedto the solution and the mixture was refluxed for 5 hours. The reactionmixture was diluted with AcOEt and washed with 0.2NHCl and water. Theorganic solution was dried over Na₂ SO₄ and concentrated in vacuo.Separation by column chromatography [SiO₂ 50 g, eluted with 5% AcOEt inbenzene] gave 540 mg (89.1%) of compound II a5(2S*-t) as a colorlessoil. ¹ HNMR (CDCl₃): δ ppm 1.45-1.83(m,2H), 2.25(m,1H), 2.90(brs,1H),3.06(brs,1H), 3.77(s,3H), 4.33(m,1H), 4.57(s,2H), 4.63(d,J=7 Hz, 1H),5.05(s, 2H), 6.06-6.60(m,2H), 6.82(A₂ B₂ type,Apart,J=9 Hz, 2H), 7.23(A₂B₂ type,Bpart,J=9 Hz,2H), 7.31(brs,5H).

(5) Preparation of I a5-a(2S*-t)

1 Methyl ester I a5-aa(2S*-t)

Catalytic reduction of compound II a5(2S*-t), 204 mg (0.5 mM) in 6 ml ofmethanol using 10% palladium-carbon (50 mg) as a catalyst gave thesaturated amine.

To a solution of the amine in 5 ml of CH₂ Cl₂, triethylamine (139 μl,0.5 ml×2) and benzenesulfonyl chloride (83 μl, 0.5 ml×1.3) were added at0° C. and the mixture was stirred for 15 minutes at 0° C. The reactionmixture was partitioned between AcOEt and 0.1NHCl and the organic layerwas washed with water, dried over Na₂ SO₄ and concentrated in vacuo.Separation by column chromatography [SiO₂, Merck Lobar A, eluted with20% AcOEt in n-hexane] gave 150 mg (72.5%) of compound I a5-aa(2S*-t) asa colorless gum. ¹ HNMR (CDCl₃): δ ppm 1.10-1.85(m,6H), 2.20(m,3H),3.60(m,1H), 3.79(s,3), 4.56(s,2H), 5.48(d,J=7 Hz,1H), 6.67(A₂ B₂ type,Apart,J=9 Hz,2H), 6.93 (A₂ B₂ type, Bpart,J=9 Hz,2H), 7.20-7.85(m, 5H)

2 Free carboxylic acid

Compound I a5-aa(2S*-t), 147 mg (0.35 mM) was hydrolysed as usual using1N KOH to give 130 mg (92.9%) of compound I a5-ba(2S*-t) as colorlessprisms. mp 150°-152° C. ¹ HNMR (acetone-d₅): δ ppm 1.00-1.90(m,6H),2.00-2.40(m,3H), 3.53(m,1H), 4.60(s,2H), 6.70(A₂ B₂ type,Apart, J=9Hz,2H), 6.81(d,J=7 Hz,1H), 6.97(A₂ B₂ type, Bpart,J=9 Hz,2H),7.25-7.85(m,5H).

3 Sodium salt

Treatment of compound I a5-ba(2S*-t), 116 mg (0.289 mM) with sodiummethoxide in methanol as usual gave 110 mg (90.2%) of compound Ia5-ca(2S*-t) as a colorless powder.

I-5 EXAMPLE 44

(1) Preparation of8-endo-9-endo-4,7-methano-1,4,5,6,7,8,9-hexahydro-1H-indene 2 ##STR106##

According to the method described in Brown, et al., J. Organic Chem.,37, 4098, (1972), selective reduction is carried out as follows:

To a suspension of 9.3 g (37.37 mM) of nickel acetate tetrahydrate in180 ml of ethanol is added 1.42 g (37.37 mM) of sodium borohydride at20° C., and the mixture is stirred for 30 minutes. Then, 39.67 g (0.3M)of dicyclopenetadiene (Nakarai Chemicals, Ltd.) and 20 ml of ethanol areadded thereto. The resulting mixture is catalytically hydrogenated underthe usual pressure. The reaction is stopped when 6.72 L (1 eq.) ofhydrogen is absorbed. The reaction mixture is distributed betweenn-pentane and water. The aqueous layer is extracted with n-pentanetwice. The extract is mixed with the above n-pentane solution, washedwith water, dried over sodium sulfate, and evaporated under reducedpressure at a temperature of 10° C. or less. The residue is distilledunder usual pressure to give 33.8 g of the compound 2, (Yield 84.5%).Colorless, semicrystal.

bp. 184°˜186° C.

¹ H-NMR(CDCl₃): δ ppm 1.00-1.75(m, 6H), 2.00-2.70(m, 5H), 2.96(m, 1H),5.43-5.85(m, 2H).

(2) Synthesis of cis-[3-carboxybicyclo[2.2.1]hept-2-yl]-acetic acid##STR107##

A solution of 10.74 g of compound 2 in 200 ml of dichloromethane issubjected to ozonolysis at -78° C. At the same temperature, 50 ml ofacetic acid and 25 g of zinc dust are added, and the mixture isgradually warmed up to 20° C. The zinc dust is filtered off and thefiltrate is washed with 1% sodium hydrogencarbonate aqueous solution andwith water, dried over sodium sulfate, and evaporated under reducedpressure. The residue is dissolved in 200 ml of acetone. To a solutionof the residue in 200 ml of acetone is added 36 ml of Jones reagent at0° C., and the mixture is stirred for 4 hours at 23° C. The reactionmixture is left standing overnight at room temperature and thenevaporated under reduced pressure. Ethyl acetate is added to the residueand the resulting solution is washed with water, dried over sodiumsulfate, and evaporated under reduced pressure. The residue iscrystallized from ether and petroleum ether to give 6.6 g of compound3(Yield 41.7%), mp.133°˜136° C.

¹ H-NMR(CDCl₃): δ ppm 1.25-1.75(m,6H), 2.05-2.70(m,4H), 2.83-3.35(m,2H), 10.32(br.s, 2H).

IR(CHCl₃): νmax 2450-3550, 1708 cm⁻¹.

Anal. Calcd. for C₁₀ H₁₄ O₄ : (%): C 60.58, H 7.13, Found (%): C 60.47,H 7.05.

(3) Synthesis of methlycis-[(3-carboxy)-bicyclo[2.2.1]hept-2-yl]-acetate ##STR108##

A suspension of 7.2 g (36.3 mM) of compound 3 in 40 ml of aceticanhydride in a stream of nitrogen is stirred at 100° C. for 5 minutes todissolve the compound. At the same temperature, the solution isevaporated under reduced pressure. To the residue 200 ml of toluene isadded, which is evaporated under reduced pressure. This operation isrepeated twice to completely remove acetic anhydride, and 30 ml ofmethanol is added to the resulting residue. The mixture is refluxed for20 minutes. The reaction mixture is evaporated under reduced pressureand subjected to column chromatography [silica-gel: Merck, Lobar columnC, developed with chloroform] to give 7.2 g of compound 4, (Yield93.5%). Light yellow oil.

¹ H-NMR(CDCl₃): δ ppm 1.20-1.80(m, 6H), 2.15-2.67(m, 4H), 2.68-3.10(m,2H), 3.63(s, 3H), 10.49(br.s, 1H).

Anal. Calcd. for C₁₁ H₁₆ O₄.0.1H₂ O (%): C 61.71, H 7.64, Found (%): C61.79, H 7.38.

(4) Synthesis of methylcis-[(3-benzyloxycarbonylamino)bicyclo[2.2.1]hept-2-yl]acetate##STR109##

To a solution of 4.25 g (20 mM) of compound 4 in 40 ml of acetone isadded 10 ml of water, 3.61 ml (20 mM×1.3) of triethylamine, and 2.49 ml(20 mM×1.3) of ethyl chloroformate in a stream of nitrogen at 0° C. Themixture is stirred for 45 minutes at the same temperature. A solution of19.5 g (20 ml×1.5) of sodium azide in 10 ml of water is added to thereaction mixture at 0° C. and the mixture is stirred for 1 hour at thesame temperature. Ether is added to the reaction mixture, which iswashed with 0.1N hydrochloric acid, water and saturated sodium chloridesolution, dried over sodium sulfate and evaporated under reducedpressure to give an azide compound. A solution of the obtained azide in50 ml of benzene is refluxed for 1 hour. The reaction mixture isrefluxed for 3 hours after the addition of 5 ml of benzyl alcohol and3.6 ml of triethylamine. After cooled, the resulting mixture is washedwith 0.1N hydrochloric acid, dried, and evaporated under reducedpressure. The residue is subjected to column chromatography [silica gel:Merck, Lobar C, developed with benzene-ethyl acetate (5%)] to give 3.75g of compound 5, (Yield 59.1%).

Colorless prisms, mp. 70° C.

¹ HNMR(CDCl₃): δ ppm 1.25-1.63(m, 6H), 2.07-2.70(m, 5H), 3.58(s, 3H),4.11(t.d., J=9, 5 Hz, 1H), 4.90(d, J=9 Hz, 1H), 5.07(s, 2H), 7.34(s,5H).

Anal. Calcd. for C₁₈ H₂₃ O₄ N (%): C 68.11, H 7.32, N 4.41, Found (%): C67.96, H 7.29, N 4.53.

(5) Synthesis of methylcis-5(Z)-7-[(3-benzyloxycarbonylamino)bicyclo[2.2.1]hept-2-yl]-5-heptenoat##STR110##

To a solution of 1.00 g (3.15 mM) of compound 5 in 10 ml of toluene isadded 5.35 ml (3.15 mM×1.7) of diisobutyl aluminum hydride (1.0M inhexane) in a stream of nitrogen at -78° C. and the mixture is stirredfor 45 minutes at the same temperature. To the reaction mixture is added8 ml of 2N hydrochloric acid and the resulting mixture is diluted withethyl acetate. The organic layer is washed with water and allprecipitated substances are filtered off. The filtrate is dried, andconcentrated under reduced pressure to give a light yellow oil.Separately, 907 mg (3.15 mM×8×0.9) of sodium hydride (60% in mineraloil) is suspended in 40 ml of dimethylsulfoxide (hereinafter abbrevatedto as DMSO). The suspension is stirred for 1.5 hours at 75° C., andafter the reaction mixture is cooled to 12° C., a solution of 5.58 g(3.15×4) of 4-carboxybutyl triphenylphosphonium bromide in 10 ml of DMSOis dropwise added thereto. The resulting yellow red solution is stirredfor 20 minutes at 20° C., to which the previously obtained hemiacetal,dissolved in 10 ml of DMSO, is added at 20° C. At the same temperature,the mixture is stirred for 2.5 hours. Ethyl acetate is added to thereaction mixture, which is washed with 0.2N hydrochloric acid and water,dried over sodium sulfate, concentrated under reduced pressure. Theresidue obtained is subjected to column chromatography [silica-gel 25 g,developed with benzene-ethyl acetate (9:1)-(4:1)]. Fractions ofcarboxylic acid are collected and concentrated under reduced pressure.Then, the residue is dissolved in 5 ml of ethyl acetate and treated withdiazomethane in a conventional way to give methyl ester. The product issubjected to column chromatography again [silica gel: Merck, Lobar B,developed with n-hexane-ethyl acetate (9:1)] to give 416 mg of compound6, (yield 34.3%). Colorless oil.

¹ H-NMR(CDCl₃): δ ppm 1.36(br.s, 6H), 1.55-2.43(m, 9H), 2.36(t, J=7 Hz,2H), 3.62(s, 3H), 4.03(m, 1H), 4.90(d, J=9 Hz, 1H). 5.06(s, 2H), 5.27(m,2H), 7.31(s, 5H).

IR(CHCl₃): 3440, 1720, 1505 cm⁻¹.

Anal. Calcd. for C₂₃ H₃₁ NO₄ (%): C 71.65, H 8.12, N 3.63, Found (%): C71.55, H 8.10, N 3.57.

(6) Synthesis of methylcis-5(Z)-7-[(3-phenylsulfonamido)bicyclo[2.2.1]hept-2-yl]-5-heptenoate##STR111##

To 200 mg (0.51 mM) of compound 6 is added 0.5 ml of anisole and 3 ml oftrifluoroacetic acid. The solution is stirred for 4 hours at 45° C. Thereaction mixture is concentrated under reduced pressure, benzene isadded to the residue and the mixture is concentrated again. Thisoperation is repeated three times to completely remove trifluoroaceticacid. To a solution of the residue in 4 ml of dichloromethane is added99 μl (0.51 mM×1.5) of benzenesulfonyl chloride and 215 μl (0.51 mM×3)of triethylamine at 0° C., and the mixture is stirred for 15 minutes at20° C. Ethyl acetate is added to the reaction mixture. The mixture issuccessively washed with 0.1N hydrochloric acid, water, 1% sodiumhydrogencarbonate, and water, dried over sodium sulfate, andconcentrated under reduced pressure. The residue is subjected to columnchromatography [silica-gel, Merck, Lobar A, developed withn-hexane-ethyl acetate (10%)] to give 160 mg of compound 7, (Yield80.4%).

Colorless prisms, mp. 79° C.

¹ H-NMR(CDCl₃): δ1.05-2.25(m, 15H), 2.29(t, J=8 Hz, 2H), 3.60(m, 1H),3.66(s, 3H), 5.03(d, J=9 Hz 1H), 5.26(m, 2H), 7.33-7.60(m, 3H),7.70-8.00(m, 2H).

Anal. Calcd. for C₂₁ H₂₉ NO₄ S (%): C 64.41, H 7.48, N 3.58, S 8.19,Found (%): C 64.82, H 7.24, N 3.51, S 8.05.

(7) Synthesis ofcis-5(Z)-7-[(3-phenylsulfonamide)bicyclo[2.2.1]hept-2-yl]-5-heptenoicacid ##STR112##

To a solution of 120 mg (0.306 mM) of compound 7 in 2.0 ml of methanolis added 0.61 ml (0.306 mM×2) of 1N potassium hydroxide. The mixture isstirred for 3 hours, and left standing overnight. The solution isdistributed between ether and water. To the aqueous layer 0.1Nhydrochloric acid is added, which is extracted with ethyl acetate. Theethyl acetate layer is washed with water, dried over sodium sulfate andconcentrated under reduced pressure. The residue is crystallized frompetroleum ether to give 109 mg of compound 8, (Yield 94.3%).

Colorless pillars, mp. 104°-106° C.

¹ H-NMR(CDCl₃): δ1.05-2.25(m, 15H), 2.33(t, J=7 Hz, 2H), 3.63(t.d., J=9,3 Hz, 1H), 5.25(m, 2H), 5.44(d, J=9 Hz, 1H), 7.33-7.70(m, 3H),7.75-8.03(m, 2H), 9.10(br.s, 1H).

Anal. Calcd. for C₂₀ H₂₇ NO₄ S (%): C 63.62, H 7.22, N 3.71, S 8.49,Found (%): C 63.46, H 7.17, N 3.65, S 8.26.

(8) Synthesis of sodiumcis-5(Z)-7-[(3-phenylsulfonamido)bicyclo[2.2.1]hept-2-yl]-heptenoate##STR113##

To a solution of 97 mg (0.25 mM) of compound 8 in 1 ml of methanol isadded 1.08 ml of sodium methoxide (0.219M in methanol) at 0° C. Themixture is stirred for 15 minutes at the same temperature and thereaction mixture is concentrated under reduced pressure. The residuedissolved in 3 ml of water is freeze-dried to give 97 mg of compound 9,(Yield 94.2%).

Colorless powder.

¹ H-NMR (CDCl₃ +CD₃ OD): δ1.00-2.35(m, 17H), 3.55(m, 1H), 5.29(m. 2H),7.40-7.70(m, 3H), 7.75-8.00(m, 2H).

EXAMPLE 45

(1) Synthesis of methylcis-[(3-diphenylmethoxycarbonyl)bicyclo[2.2.1]hept-2-yl]-acetate##STR114##

To a solution of 7.0 g (33 mM) of compound 4 in 30 ml of ethyl acetateis added 6.4 g (33 mM) of diphenyldiazomethane at 20° C. The mixture isstirred for 2 hours at 45° C. The reaction mixture is concentrated underreduced pressure, and the residue is subjected to column chromatography[silica-gel: Merck, Lobar C, developed with n-hexane-ethyl acetate (2%)]to give 7.3 g (58.4%) of compound 10. Colorless oil.

¹ H-NMR(CDCl₃): δ1.15-1.75(m, 6H), 2.10-3.20(m, 6H), 3.46(s, 3H),6.79(s, 1H), 7.32(s, 10H).

(2) Synthesis of methyltrans-[(3-diphenylmethoxycarbonyl)bicyclo[2.2.1]hept-2-yl]-acetate##STR115##

To a solution of 5.30 g (14 mM) of compound 10 in 50 ml of toluene isadded 2.09 ml (14 mM) of diazabicycloundecene (DBU). The mixture isrefluxed under heating for 3 days. After being cooled, the reactionmixture is washed with 0.2N hydrochloric acid and water, dried oversodium sulfate, and concentrated under reduced pressure. The residue iscrystallized from petroleum ether to give 3.70 g of compound 11, (Yield69.8%).

Colorless pillars, mp. 65° C.

¹ H-NMR(CDCl₃): δ ppm 1.10-1.75(m, 6H), 1.98(m, 1H), 2.13-2.75(m,5H),3.49(s, 3H), 6.87(s, 1H), 7.35(s, 10H).

Anal. Calcd. for C₂₄ H₂₆ O₄ (%): C 76.15, H 6.94, Found (%): C 76.26, H6.83.

(3) Synthesis of methyltrans-[(3-carboxy)-bicyclo[2.2.1]hept-2-yl]-acetate ##STR116##

To a solution of 3.7 g of compound 11 in 30 ml of dichloromethane isadded 7.6 ml of anisole and 7.6 ml of trifluoroacetic acid at 0° C. Themixture is stirred for 1 hour at the same temperature. The reactionmixture is concentrated under reduced pressure and the residue issubjected to column chromatography [silica gel 70 g, developed withchloroform and chloroform-methanol (5%), successively] to give 2.06 g ofcompound 12(Yield 98.1%), Colorless oil.

¹ H-NMR(CDCl₃): δ ppm 1.05-2.00(m, 7H), 2.20-2.70(m, 5H), 3.67(s, 3H),9.40(br.s, 1H).

Anal. Calcd. for C₁₁ H₁₆ O₄ (%): C 62.24, H 7.61, Found (%): C 61.96, H7.48.

(4) Synthesis oftrans-[(3-benzyloxycarbonylamino)bicyclo[2.2.1]hept-2-yl]-acetate##STR117##

To a solution of 2.04 g (9.6 mM) of compound 12 in 20 ml of acetone isadded 5 ml of water, 1.73 ml (9.6 mM×1.3) of triethylamine and 1.19 ml(9.6 mM×1.3) of ethyl chloroformate in a stream of nitrogen at 0° C. Themixture is stirred for 45 minutes at the same temperature. To thereaction mixture is added a solution of 0.94 g of sodium azide in 5 mlof water at 0° C., and the resulting mixture is stirred for 1 hour atthe same temperature. Ether is added to the mixture, which issuccessively washed with 0.1N hydrochloric acid, water, and saturatedsodium chloride aqueous solution, dried over sodium sulfate, andconcentrated under reduced pressure. The residue is dissolved in 30 mlof benzene and refluxed for 1 hour. In addition, 2.5 ml of benzylalcohol and 1.5 ml of triethylamine are added to the mixture, andrefluxed for 3 hours. After being cooled, the reaction mixture is washedwith 0.2N hydrochloric acid and concentrated under reduced pressure. Theresidue is subjected to column chromatography [silica gel; Merck, LobarB, developed with benzene-ethyl acetate (3%)] to give 2.56 g of compound13, (Yield 84.0%). Colorless oil.

¹ H-NMR(CDCl₃): δ ppm 1.05-1.70(m, 6H), 1.93(m, 1H), 2.22(br.s, 3H),2.34, 2.72(ABq.d., J=16, 8, 7 Hz, 2H), 3.03(m, 1H), 3.64(s, 3H),4.80(br.s., 1H), 5.09(s, 2H), 7.38(s, 5H).

Anal. Calcd. for C₁₈ H₂₃ O₄ N (%): C 68.11, H 7.32, N 4.41, Found (%): C67.87, H 7.27, N 4.76.

(5) Synthesis oftrans-[3-benzenesulfonamidobicyclo[2.2.1]hept-2-yl]-acetate ##STR118##

A solution of 1.00 g (3.15 mM) of compound 13 in 2.0 ml of anisole and10 ml of trifluoroacetic acid is stirred in a stream of nitrogen underwarming at 45° C. for 4 hours. The trifluoroacetic acid is completelyremoved (using benzene) under reduced pressure. To the residue dissolvedin 15 ml of dichloromethane is added 1.31 ml (3.15 mM×3) oftriethylamine and 603 μl (3.15 mM×1.5) of benzenesulfonyl chloride in astream of nitrogen at 0° C. The mixture is stirred for 15 minutes at 20°C. After the reaction mixture is concentrated under reduced pressure,ethyl acetate is added thereto. The resulting mixture is washed with0.2N hydrochloric acid and water, dried over sodium sulfate, andconcentrated under reduced pressure. The residue is subjected to columnchromatography [silica gel: Merck, Lobar B, developed withn-hexane-ethyl acetate (4:1)] to give 694 mg of compound 14, (Yield68.2%). Colorless oil.

¹ H-NMR(CDCl₃): δ ppm 0.77-1.75(m, 6H), 1.75-2.40(m, 5H), 2.47(t, J=5Hz, 1H), 3.57(s, 3H), 5.35(d, J=5 Hz, 1H), 7.36-7.67(m, 3H),7.80-8.03(m, 2H).

Anal. Calcd. for C₁₆ H₂₁ NO₄ S.0.2H₂ O: (%): C 58.75, H 6.61, N 4.28, S9.80, Found (%): C 58.57, H 6.42, N 4.46, S 9.57.

(6) Synthesis of methyltrans-5(Z)-7-[(3-phenylsulfonamido)bicyclo[2.2.1]hept-2-yl]-5-heptenoate##STR119##

To a solution of 530 mg (1.63 mM) of compound 14 in 5 ml of toluene isadded 3.26 ml (1.63 mM×1.8) of diisobutylaluminum hydride (1.0M inhexane) in a stream of nitrogen at -78° C. The mixture is stirred for 30minutes at the same temperature. To the reaction mixture is added 4 mlof 2N hydrochloric acid and 10 ml of ethyl acetate. The ethyl acetatelayer is washed with water, dried over sodium sulfate, and thenconcentrated under reduced pressure to give a the aldehyde as a crudeproduct. Separately, 460 mg (1.63 mM×8×0.9) of sodium hydride (60.0% inmineral oil) is suspended in 15 ml of DMSO. The suspension is warmed at70° C. for 1.5 hours in a stream of nitrogen, and cooled to 12° C., towhich 2.84 g (1.63 mM×4) of 4-carboxybutyl triphenylphosphonium bromidedissolved in 5 ml of DMSO is added. The resulting yellow red solution isstirred for 20 minutes at 20° C. The solution of above prepared aldehydein 5 ml of DMSO is added to the above solution at 20° C. and the mixtureis stirred at the same temperature for 1.5 hours. The reaction mixtureis poured into a mixture of 2N hydrochloric acid and ice, and extractedwith ethyl acetate. The organic layer is washed with water, dried oversodium sulfate and concentrated under reduced pressure. The residue issubjected to column chromatography [silica gel 15 g, developed withbenzene ethyl acetate (9:1)-(4:1)] to give the carboxylic acid as acrude product. The crude carboxylic acid is converted into methyl esterby processing with diazomethane in the conventional way, and 220 mg ofcompound 15 is given by column chromatography [silica gel, Merck, LobarA, developed with n-hexane-ethyl acetate (9:1)], (Yield 34.6%).Colorless pillars, mp. 70° C.

¹ H-NMR(CDCl₃): δ0.75-2.40(m, 15H), 2.26(t, J=7 Hz, 2H), 2.55(m, 1H),3.68(s, 3H), 4.90(d, J=7 Hz, 1H), 5.18(m, 2H), 7.36-7.75(m, 3H),7.75-8.10(m, 2H).

Anal. Calcd. for C₂₁ H₂₉ NO₄ S (%): C 64.41, H 7.48, N 3.58, S 8.19,Found (%): C 64.28, H 7.32, N 3.55, S 8.01.

(7) Synthesis oftrans-5(Z)-7-[(3-phenylsulfonamido)bicyclo[2.2.1]hept-2-yl]-5-heptenoicacid ##STR120##

To a solution of 190 mg (0.485 mM) of compound 15 in 3.0 ml of methanolis added 0.97 ml (0.485 mM×2) of 1N potassium hydroxide at 20° C. Themixture is stirred for 2 hours and left standing overnight. The reactionmixture is distributed between ether and water, and the aqueous layer isacidified with 0.2N hydrochloric acid and extracted with ethyl acetate.The ethyl acetate layer is washed with water, dried over sodium sulfateand concentrated under reduced pressure. The resulting crystal isrecrystallized from a mixture of ether-pertroleum ether to give 162 mgof compound 16, (Yield 88.5%). Colorless pillars, mp. 82°-83° C.

¹ H-NMR(CDCl₃): δ ppm 0.83-2.27(m, 15H), 2.31(t, J=7 Hz, 2H), 2.53(m,1H), 5.00(d, J=7 Hz, 1H), 5.17(m, 2H), 7.35-7.70(m, 3H), 7.80-8.05(m,3H).

Anal. Calcd. for C₂₀ H₂₇ NO₄ S (%): C 63.62, H 7.22, N 3.71, S 8.49,Found (%): C 63.48, H 7.06, N 3.61, S 8.25.

(8) Synthesis of sodiumtrans-5(Z)-7-[(3-phenylsulfonamido)bicyclo[2.2.1]hept-2-yl]-5-heptenoate##STR121##

To a solution of 153 ml (0.405 mM) of compound 16 in 1.5 ml of methanolis added 1.85 ml (0.405 mM×0.95) of sodium methoxide (0.219M inmethanol) in a stream of nitrogen at 0° C. The mixture is stirred for 15minutes at the same temperature and the reaction mixture is concentratedunder reduced pressure. Then, a solution of the residue dissolved in 1.5ml of water is freeze-dried to give 158 mg of compound 17, (Yield97.7%). Colorless powder.

¹ H-NMR(CDCl₃ +CD₃ OD): δ ppm 0.75-2.25(m, 15H), 2.16(t, J=7 Hz, 2H),2.42(br.s, 1H), 5.23(m, 2H), 7.40-7.65(m, 3H), 7.80-8.02(m, 2H).

I-6 EXAMPLE 46

(1) Exo-3-benzenesulfonamido-exo-2-bicyclo[2.2.1]heptan-2-carboxylicacid 2a ##STR122##

The amino acid 1(12.42 g (80 mM)) which is prepared according to themethod described in the literature is dissolved in 100 ml of 10%potassium hydroxide aqueous solution, to which 5.1 ml of phenylsulfonylchloride is added at 0° C., and the mixture is stirred at the sametemperature for 20 minutes. An additional 5.1 ml of phenylsulfonylchloride (total: 80 mM) is added, and the mixture is stirred at the sametemperature for 1 hour. Ether is added, and the mixture is acidifiedwith 2N-hydrochloric acid. The organic layer is washed with water, driedon sodium sulfate and evaporated under the reduced pressure, and theresidue is applied to column chromatography [100 g of silica gel;developed with chloroform-methanol (2%-10%)] to give 9.10 g (38.6%yield) of the compound 2a as colourless prisms, mp. 148° C.

¹ HNMR: (CDCl₃) δ ppm 0.80˜2.05(m, 6H), 1.86(br.s, 1H), 2.49(br .s, 1H),2.73(d, J=8 Hz, 1H), 3.66(t, J=8 Hz, 1H), 6.70(d, J=8 Hz, 1H),7.70(br.s, 1H), 7.37˜8.05(m, 5H).

Anal. Calcd. (%) for C₁₄ H₁₇ NO₄ S: C; 56.92, H; 5.81, N; 4.74, S;10.85, Found (%): C; 56.72, H; 5.80, N; 4.74, S; 10.71.

(2) Exo-2-hydroxymethyl-exo-3-benzenesulfonamidobicyclo[2.2.1]heptane 3a##STR123##

To a solution of 1.18 g (4 mM) of the compound 2a in 10 ml oftetrahydrofuran (hereinafter referred to as THF) is added 16 ml (16 mM)of diborane [1M THF solution; Aldrich] at 0° C., and the mixture isstirred at 20° C. for 4 hours. Ethyl acetate is added, and the mixtureis washed with 0.2N-hydrochloric acid and then with water, dried onsodium sulfate, and evaporated under reduced pressure. The residue isapplied to column chromatography [50 g of silica gel; developed withbenzene-ethyl acetate (9:1-4:1)] to give 700 mg (62.3% yield) of thecompound 3a as colourless gummy material.

¹ HNMR: (CDCl₃) δ ppm 0.80˜2.00(m, 7H), 2.04(br.s, 2H), 2.40(br.s, 1H),3.30(t, J=8 Hz, 1H), 3.66(m, 2H), 5.81(d, J=8 Hz, 1H), 7.45˜8.10(m, 5H).

Anal. Calcd. (%) for C₁₄ H₁₉ NO₃ S: C; 59.75, H; 6.82, N; 4.98, S;11.39, Found (%): C; 59.93, H; 6.72, N; 4.55, S; 10.94.

(3) Exo-2-formyl-exo-3-benzenesulfonamidobicyclo[2.2.1]heptane 4a##STR124##

To a solution of 700 mg of the compound 3a in 30 ml of dichloromethaneis added 3.2 g of chromic acid pyridine complex at 0° C., and themixture is stirred for 1 hour. The upper clear solution is collected,and the insoluble material is washed with dichloromethane. The washingis combined with the upper solution and passed through 10 g of silicagel in order to remove inorganic portion, and the eluate is condensed togive 435 mg (62.7% yield) of the compound 4a as colourless gummymaterial.

¹ HNMR: (CDCl₃) δ ppm 0.95˜1.90(m, 6H), 2.01(br.s, 1H), 2.50(br.s, 1H),2.60(d.t, J=8, 1 Hz, 1H), 3.61(t.d, J=8, 1 Hz, 1H), 5.62(d, J=8 Hz, 1H),7.35˜8.00(m, 5H), 9.56(d, J=1 Hz, 1H).

Anal. Calcd. (%) for C₁₄ H₁₇ NO₃ S: C; 60.18, H; 6.15, N; 5.01, S;11.48, Found (%): C; 60.18, H; 5.99, N; 5.04, S; 11.52.

(4) Exo-2-methoxyethenyl-exo-3-benzenesulfonamidobicyclo[2.2.1]heptane5a ##STR125##

To a suspension of 2.40 g (2 mM×3.5) ofmethoxymethyltriphenylphosphonium chloride in 20 ml of THF is added 3.75ml (2 mM×3.0) of n-butyllithium (1.6M n-hexane solution) at -78° C., andthe mixture is stirred at 0° C. for 20 minutes. Then, a solution of 558mg (2 mM) of the aldehyde 4a in 5 ml of THF is added, and the mixture iswarmed up to 20° C. over a period of 30 minutes. The reaction mixture isdistributed into ethyl acetate and water, and the organic layer is driedon sodium sulfate and evaporated under reduced pressure. The residue isapplied to column chromatography [40 g of neutral aluminium oxide, gradeI; developed with n-hexane-ethyl acetate (10%)] to give 300 mg (48.8%yield) of the enol ether 5a. This is used in the next reaction,immediately.

(5)5(Z)-7-[Exo-3-benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid methyl ester Ia-aa(2S*-c) ##STR126##

The enol ether 5a (300 mg) is dissolved in 0.5 ml 90% formic acid andallowed to stand at 20° C. for 20 minutes. Ethyl acetate is added, andthen 5% sodium bicarbonate aqueous solution added, and the organic layercollected is dried on sodium sulfate and evaporated under reducedpressure to give 270 mg of the aldehyde as colourless foamy material.

Sodium hydride (60% in mineral oil) (460 mg; 0.92 mM×7×2×0.9) isdispersed in 15 ml dimethylsulfoxide (hereinafter referred to as DMSO)and stirred at 70° C. for 1.5 hours. After cooling to 12° C., 2.84 g(0.92 mM×7) of 4-carboxybutyltriphenylphosphonium bromide is addedthereto to give an organe solution, to which is added a solution of 270g of the above-prepared aldehyde in 5 ml of DMSO at 12° C., and themixture is stirred at 20° C. for 1.5 hours. The reaction mixture isdistributed into ethyl acetate and saturated ammonium chloride solution,and the organic layer is washed with water, dried on sodium sulfate andevaporated under reduced pressure. The residue is applied to columnchromatography [15 g of silica gel; developed with benzene-ethyl acetate(9:1-2:1)] to give 200 mg of the carboxylic acid. This is dissolved in 5ml of ethyl acetate, treated with diazomethane in a conventional way foresterification, and purified by column chromatography [silica gel: MerckLober A; developed with n-hexane-ethyl acetate (4:1)] to give 241 mg(30.8% yield form 4a) of the compound Ia-aa(2S*-c) as colorless gummymaterial.

¹ HNMR: (CDCl₃) δ ppm 0.80˜2.20(m, 15H), 2.30(t, J=7 Hz, 2H), 3.30(t,J=8 Hz, 1H), 3.67(s, 3H), 4.80(d, J=8 Hz, 1H), 5.33(m, 2H), 7.35˜8.03(m,5H).

Anal. Calcd. (%) for C₂₁ H₂₉ NO₄ S: C; 64.41, H; 7.48, N; 3.58, S; 8.19,Found (%): C; 64.20, H; 7.32, N; 3.18, S; 8.26.

(6)5(Z)-7-[Exo-3-benzenesulfonamidobicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid Ia-ba(2S*-c) and its sodium salt Ia-ca(2S*-c) ##STR127##

1 Carboxylic acid Ia-ba(2S*-c)

To a solution of 210 mg (0.536 mM) of the compound Ia-aa(2S*-c) in 3 mlof methanol is added 1.07 ml (0.536 mM×2) of 1N-potassium hydroxide, andthe mixture is stirred at 20° C. for 2 hours and then allowed to standovernight at the same temperature. Ethyl acetate is added, and themixture is washed with 0.1N-hydrochloric acid and water, dried on sodiumsulfate, and evaporated under reduced pressure to give 203 mg (100%yield) of the compound Ia-ba(2S*-c) as colorless gummy material.

¹ HNMR: (CDCl₃) δ ppm 0.85˜2.23(m, 15H), 2.36(t, J=8 Hz, 2H), 3.32(t,J=8 Hz, 1H), 5.25(d, J=8 Hz, 1H), 5.36(m, 2H), 7.40˜8.03(m, 5H),8.48(br.s, 1H).

Anal. Calcd. (%) for C₂₀ H₂₇ NO₄ S.0.1C₆ H₆ : C; 64.20, H; 7.23, N;3.64, S; 8.32, Found (%): C; 64.32, H; 6.92, N; 3.52, S; 8.06.

2 The sodium salt Ia-ca(2S*-c)

The compound Ia-ba(2S*-c) is treated with sodium methoxide in aconventional way to give the sodium salt Ia-ca(2S*-c) as colourlesspowder in 94.7% yield.

I-7 EXAMPLE 47

(1) Monomethyl 2-exo-3-exo-7-oxabicyclo[2.2.1]heptan-2,3-dicarboxylate2a ##STR128##

A mixture of 24.3 g of exo-hexahydro-4,7-epoxyisobenzofuran-1,3-dione 1and 200 ml of dry methanol is heated under refluxing for 18 hours. Thereaction mixture is evaporated under reduced pressure to givecrystalline residue, which is recrystallized from ethyl acetate to give27.5 g of the titled compound 2a in 95.1% yield. Mp. 144°˜146° C.

IR(Nujol): νmax 1737, 1697 cm⁻¹.

NMR(DMSO-d₆): δ ppm 1.52(4H, s), 2.98(2H, s), 3.50(3H, s), 4.66(2H, s).

Anal. Calcd. (%) for C₉ H₁₂ O₅ : C, 54.00; H, 6.04. Found (%): C, 54.04;H, 5.93.

(2) Methylcis-exo-3-benzyloxycarbonylamino-7-oxabicyclo[2.2.1]heptan-exo-2-carboxylate3a ##STR129##

Acetone is added to a mixture of 46.8 g of the carboxylic acid preparedin Example 47(1) and 42 ml of water until it become a homogeneoussolution. Under ice-cooling, a solution of 27.8 g of triethylamine in490 ml of acetone is added thereto and then a solution of 34.1 g ofethyl chloroformate in 120 ml of acetone is added over a 30 minutesperiod. The resulting mixture is stirred at 3° C. for 30 minutes, towhich is added 80 ml of aqueous solution of 23.2 g of sodium azide underice-cooling over a 30 minute period. The reaction mixture is stirred at3° C. for an hour, and poured into ice-cooled water, and the mixture isextracted with ether. The organic layer is washed with a saturatedaqueous solution of sodium chloride, dried over magnesium sulfate andevaporated to give an oily residue.

IR(Film): νmax 2130 cm⁻¹.

A solution of the above prepared acid azide dissolved in 200 ml ofbenzene is heated under refluxing for 2 hours. A small amount of thereaction mixture is collected and evaporated under reduced pressure togive an oily substance.

IR(Film): νmax 2230 cm⁻¹.

To the remaining reaction mixture is added 12 ml of triethylamine and 25ml of benzyl alcohol and the mixture is heated under refluxing for 4hours. The volatile substance is removed by distillation from thereaction mixture under reduced pressure. The residue is crystallizedfrom ether to give 47.2 g of 3a as colorless crystals in 66.1% yield(from the carboxylic acid).

mp. 108° C.

IR(Nujol): νmax 3350, 1728, 1716 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.3˜2.0(4H, m), 2.95(1H, d, J=10 Hz), 3.55(3H, s),4.2˜4.5(2H, m), 4.79(1H, d, J=3 Hz), 5.09(2H, s), 5.50(1H, d, J=10 Hz),7.36(5H, s).

Anal. Calcd. (%) for C₁₅ H₁₉ NO₅ : C, 62.94; H, 6.27; N, 4.59. Found(%): C, 62.74; H, 6.09; N, 4.37.

(3)[exo-3-Benzyloxycarbonylamino-7-oxabicyclo[2.2.1]hept-2-yl]formaldehyde4a and[exo-3-benzyloxycarbonylamino-7-oxabicyclo[2.2.1]hept-exo-2-yl]methanol5a ##STR130##

A solution of 5.5 ml of N-methylpiperidine in 14 ml of benzene is addedto a 35% solution of sodium bis(2-methoxyethoxy)aluminium hydride in 26ml of benzene in a stream of nitrogen under ice-cooling. After stirredat 0° C. for 10 minutes, the mixture is added to a suspension of 12.3 gof the ester 3a prepared in Example 47(2) in benzene under ice-coolingand the resulting mixture is stirred at room temperature for 2.5 hours.Water and then dilute hydrochloric acid are dropwise added to themixture under ice-cooling. The two layers are separated and the aqueouslayer is extracted with ethyl acetate. The organic layers are combined,washed with a saturated aqueous solution of sodium chloride, dried oversodium sulfate, and evaporated under reduced pressure. The residue ischromatographed on 150 g of a silica gel column and eluted withhexane-ethyl acetate (1:1) to give 0.622 g of the starting material 3ain 5.1% yield as an eluate; and further elutate with ethyl acetate gives4.4 g (43.8% yield) of an about 1:1 mixture of the epimers of thealdehyde derivative containing with about 10% of the starting materialin addition to the alcohol derivative 5a. This alcohol derivative ispurified by crystallization from ether to give 0.222 g (2.0% yield).

The physical constants of the aldehyde derivative 4a:

¹ H-NMR(CDCl₃): δ ppm 1.2˜2.0(4H, m), 2.7˜3.0(1H, m), 4.0˜4.5(2H, m),4.7˜4.9(1H, m), 5.06(2H, s), 5.5˜5.9(1H, m); 7.30(5H, s), 9.50(0.5H, d,J=2 Hz), 9.73(0.5H, s).

The physical constants of the alcohol derivative 5a:

mp 174°˜175° C.

IR(Nujol): νmax 3330, 1685 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.48(4H, s), 1.95(1H, m), 3.19(1H, d, J=4 Hz),3.79(1H, t, J=10 Hz), 4.20(1H, s), 4.39(1H, s), 4.50(1H, t, J=2 Hz),5.01(2H, s), 7.11(1H, d, J=10 Hz), 7.35(5H, s).

Anal. Calcd. (%) for C₁₅ H₁₉ NO₄ : C, 64.97; H, 6.91; N, 5.05. Found(%): C, 64.73; H, 6.70; N, 5.06. ##STR131##

To a suspension of 301 mg of pyridinium chlorochromate indichloromethane is added 190.5 mg of alcohol derivative 5a in oneportion and the mixture is stirred at room temperature for 2 hours.Then, ether is added and the mixture is chromatographed on Florisil[Floridin Co.] and eluted with ether. The eluate is crystallized frombenzene to give 138 mg of the cis-exo isomer 4a in 73% yield.

Mp. 117°-119° C.

IR(Nujol): νmax 3300, 1706 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.2˜2.0(4H, m), 2.90(1H, d, J=9 Hz), 4.3˜4.6(2H,m), 4.93(1H, m), 5.07(2H, s), 5.30(1H, m), 7.36(5H, s), 9.56(1H, d, J=2Hz).

Anal. Calcd. (%) for C₁₅ H₁₇ NO₄ : C, 65.44; H, 6.22; N, 5.09. Found(%): C, 65.55; H, 6.17; N, 4.96.

(4)2-(2-Methoxyethenyl)-exo-3-benzyloxycarbonylamino-7-oxabicyclo[2.2.1]heptane6a ##STR132##

In 100 ml of toluene is suspended 36.6 g ofmethoxymethyltriphenylphosphonium chloride and the suspension is driedby evaporation of a small amount of toluene. Separately, lituiumdiisopropylamide which is prepared from 70 ml of 1.6M solution ofn-butyl lithium in hexane, 11.0 g of diisopropylamine and 40 ml of drytetrahydrofuran at 0° C. in a stream of nitrogen is dropwise added tothe above-prepared suspension at 0° C. over a 30 minutes period. Themixture is stirred for 2 hours, to which a solution of 10 g of thealdehyde 4a (prepared in Example 47(3)) in 20 ml of dry tetrahydrofuranand 20 ml of dry toluene is dropwise added at 0° C. After stirred at 0°C. for 2.5 hours, the reaction mixture is poured into ice-water. Theseparated aqueous layer is extracted with ethyl acetate. The combinedorganic layers are washed with saturated sodium chloride aqueoussolution, dried over sodium sulfate and evaporated under reducedpressure. The residue is chromatographed on 160 g of a silica gel columnand eluted with hexane-ethyl acetate (1:1) to give 6.5 g of the titledcompound 6a and 0.9 g of the ester 3a contaminated in Example 47(3).

(5)2-[exo-3-Benzyloxycarbonylamino-7-oxabicyclo[2.2.1]hept-2-yl]acetaldehyde7a ##STR133##

A solution of 3.07 g of the ether 6a prepared in Example 47(4) in 10 mlof 90% formic acid is left standing at room temperature for 2 hours. Thesolution is poured carefully into a sodium carbonate solution andextracted with dichloromethane. The extract is washed with saturatedsodium chloride aqueous solution, dried over sodium sulfate andevaporated under reduced pressure to give 2.8 g of 7a as an oilysubstance.

IR (Film): νmax 1720 cm⁻¹.

(6) Methyl5(Z)-7-[exo-3-tert-butoxycarbonylamino-7-oxabicyclo[2.2.1]hept-2-yl]-5-heptenoateII b-b ##STR134##

To a suspension of 27.5 g of 4-carboxylbutyltriphenylphosphonium bromidein 50 ml of dry tetrahydrofuran is added 13.9 g of potassiumtert-butoxide in one portion at room temperature in a stream ofnitrogen. The mixture is stirred at room temperature for 30 minutes, andthen a solution of 6.0 g of the aldehyde 7a (prepared in Example 47(5))in 20 ml of dry tetrahydrofuran is dropwise added thereto at roomtemperature. After being stirred at room temperature for 1 hour, themixture is poured into an oxalic acid aqueous solution. The organiclayer is removed and the aqueous layers are extracted with ethylacetate. The combined organic layers are washed with saturated sodiumchloride aqueous solution, dried over sodium sulfate and evaporatedunder reduced pressure. The residue is chromatographed on 200 g of asilica gel column and eluted with hexane-ethyl acetate (1:1).

A solution of 3.2 g of the resulting crude carboxylic acid in 10 ml ofether is treated with an excess of diazomethane-ether solution. Theresidue is chromatographed on 90 g of a silica gel column and elutedwith hexane-ethyl acetate (2:1) to give 0.95 g of thetert-butoxycarbonyl derivative (hereinafter abbreviated to as BOCderivative) II b-b (Yield 13%: from the aldehyde) and 1.25 g of thebenzyloxycarbonyl derivative II b-a (Yield 15.6%: from the aldehyde).

Physical constants of the BOC derivative II b-b

¹ H-NMR (CDCl₃): δ ppm 1.45(9H, s), 1.5˜1.9(6H, m), 1.9˜2.4(7H, m),3.25(1H, dd, J=10, 3 Hz), 3.69(3H, s), 4.29(1H, d, J=5 Hz), 4.43(1H, t,J=5 Hz), 4.75(1H, m), 5.3˜5.5(2H, m).

Physical constants of the benzyloxycarbonyl derivative II b-a

¹ H-NMR (CDCl₃): δ ppm 1.3˜1.9(7H, m), 1.9˜2.5(6H, m), 3.30(1H, dd, J=9,4 Hz), 3.62(3H, s), 4.26(1H, d, J=4 Hz), 4.41(1H, t, J=4 Hz), 5.06(2H,s), 4.9˜5.2(1H, m), 5.31(2H, m), 7.31(5H, s).

(7) Methyl5(Z)-7-[exo-3-benzenesulfonamido-7-oxabicyclo[2.2.1]hept-endo-2-yl]-5-heptenoateI b-aa(2S*-t) ##STR135##

A mixture of 0.675 g of the BOC derivative (II b-b prepared in Example47(6)) in 3 ml of trifluoroacetic acid is left standing at roomtemperature for 1 hour. Then the mixture is concentrated under reducedpressure and hexane is added to the residue. This operation is repeatedto remove excess amount of trifluoroacetic acid. To a solution of theabove-mentioned salt in 10 ml of dichloromethane is added 0.7 g oftriethylamine and then 0.35 g of benzenesulfonyl chloride, the mixtureis allowed to stand at room temperature for 1 hour, then dilutedhydrochloric acid is added thereto, and then the organic layer isremoved. The aqueous layer is extracted with dichloromethane and thecollected organic layer is washed with sodium hydrogencarbonate solutionand then saturated sodium chloride aqueous solution, dried over sodiumsulfate, and evaporated. The residue is chromatographed on 25 g ofsilica gel and eluted with hexane-ethyl acetate (2:1) to give 0.417 g ofthe trans-derivative I b-aa(2S*-t) in 55.5% yield.

IR (Film): νmax 3270, 1735, 1162 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.1˜2.4(13H, m), 2.92(1H, dd, J=9, 3 Hz), 3.69(3H,s), 4.12(1H, d, J=6 Hz), 4.40(1H, t, J=6 Hz), 5.0˜5.4(3H, m), 7.60(3H,m), 7.90(2H, m).

(8)5(Z)-7-[exo-3-Benzenesulfonamido-7-oxabicyclo[2.2.1]hept-endo-2-yl]-5-heptenoicacid I b-ba(2S*-t) and its salt I b-ca (2S*-t) ##STR136##

To a solution of 0.366 g of the ester I b-aa(2S*-t) (prepared in Example47(7)) in 7.2 ml of methanol is added 7.2 ml of 10% sodium hydroxidesolution and the mixture is allowed to stand at room temperatureovernight, then acidified with diluted hydrochloric acid, and thenextracted with ethyl acetate. The organic layer is washed with saturatedsodium chloride aqueous solution, dried over sodium sulfate, andevaporated under reduced pressure to give 348 mg of I b-ba(2S*-t) as anoily substance in 98.6% yield.

IR (Film): νmax 3220, 1708, 1162 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.1˜2.5(13H, m), 2.93(1H, dd, J=10, 2 Hz),4.13(1H, d, J=3 Hz), 4.43(1H, t, J=2 Hz), 5.20(2H, m), 5.45(1H, d, J=10Hz), 7.56(3H, m), 7.90(2H, m), 9.00(1H, s).

To a solution of 311 mg of the resulting carboxylic acid I b-ba(2S*-t)in methanol is added 2.80 ml of 0.263M solution of sodium methoxide inmethanol and the mixture is evaporated under reduced pressure. Theresidue is dissolved in water and active carbon is added thereto, andthe mixture is filtered. The resulting aqueous solution is freeze-driedto give the sodium salt I b-ca(2S*-t) of which the physical constant isas follows.

IR(KBr): νmax 3420, 3260, 1565, 1324, 1159 cm⁻¹.

EXAMPLE 48

(1) Methyl5(Z)-7-[exo-benzenesulfonamido-7-oxabicyclo[2.2.1]hept-exo-2-yl]-5-heptenoateI b-aa(2R*-c) ##STR137##

The BOC derivative II b-b prepared in Example 47(6) is treated in thesame manner as in Example 47(7) and an early eluate is crystallized frombenzene-hexane to give 15 mg of the cis-derivative I b-aa(2R*-c) in 2%yield. Mp. 93°˜94° C.

The physical constants of cis-derivative I b-aa(2R*-c):

IR(KBr): νmax 3420, 3195, 1734, 1165 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.2˜2.4(13H, m), 3.60(1H, m), 3.70(3H, s),3.93(1H, t, J=2 Hz), 4.16(1H, t, J=2 Hz), 4.89(1H, d, J=10 Hz), 5.48(2H,m), 7.58(3H, m), 7.89(2H, m).

(2)5(Z)-7-[exo-3-Benzenesulfonamido-7-oxabicyclo[2.2.1]hept-exo-2-yl]-5-heptenoicacid I b-ba(2R*-c) and its salt I b-ca(2R*-c) ##STR138##

The ester prepared in Example 48(1) is treated in the same manner as inExample 47(8) to give the title compound I b-ba(2R*-c).

¹ H-NMR(CDCl₃): δ ppm 1.2˜2.5(13H, m), 3.60(1H, m), 3.99(1H, d, J=2 Hz),4.19(1H, d, J=2 Hz), 5.36(2H, m), 5.48(1H, m), 7.58(3H, m), 7.90(2H, m).

The resulting carboxylic acid I b-ba(2R*-c) is treated in the samemanner as in Example 47(8) to give the sodium salt I b-ca(2R*-c) ofwhich the physical constant is as follows.

IR(KBr): νmax 3415, 3270, 1563, 1317, 1157 cm⁻¹.

I-8 EXAMPLE 49

(1) Exo-2-cyanomethyl-7-oxabicyclo[2.2.1]heptan-exo-3-carboxylic acid 9##STR139##

A mixture of 4.3 g exo-hexahydro-4,7-epoxyisobenzofuran-1(3H)-one 8, 2.0g of potassium cyanate and 30 ml of dimethylsulfoxide is heated understirring at 180° C. for 2 hours. Water is added to the reaction mixture,to which then diluted hydrochloric acid is added carefully to acidify.The mixture is extracted with ethyl acetate and the extract is washedwith water, dried over sodium sulfate, and evaporated under reducedpressure. The residue is crystallized from ether to give 2.1 g of thetitled compound 9 in 41.6% yield of which physical constants are asfollows.

Mp. 124°-126° C.

IR(Nujol): νmax 2325, 1710, 1693 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.6˜2.2(4H, m), 2.47(2H, s), 2.5˜3.0(2H, m),4.55(1H, d, J=4 Hz), 4.86(1H, d, J=3 Hz), 8.09(1H, s).

Anal. Calcd. (%) for C₉ H₁₁ NO₃ : C, 59.66; H, 6.12; N, 7.73; Found (%):C, 59.50; H, 6.13; N, 7.76.

(2) 1 Methylexo-2-cyanomethyl-7-oxabicyclo[2.2.1]heptane-exo-3-carboxylate 10a##STR140##

To an ethereal solution of excess amount of diazomethane is added 383 mgof the above carboxylic acid 9 in small portions and the mixture isconcentrated under reduced pressure. The residue is purified bychromatography on 10 g of silica gel column and eluted with hexane-ethylacetate (1:1) to give 330 mg of the titled compound 10a, which isrecrystallized from benzene-hexane. The physical constants are asfollows. Mp. 88°-89° C.

IR(Nujol): νmax 2319, 1724 cm⁻¹

NMR(CDCl₃): δ ppm 1.3˜2.1(4H, m), 2.42(2H, s), 2.4˜2.8(1H, m), 2.83(1H,d, J=8 Hz), 3.71(3H, s), 4.50(1H, d, J=5 Hz), 4.85(1H, d, J=3 Hz).

Anal. Calcd. (%) for C₁₀ H₁₃ NO₃ : C, 61.84; H, 6.23; N, 7.21; Found(%): C, 61.35; H, 6.67; N, 7.23.

2 Exo-2-cyanomethyl-7-oxabicyclo[2.2.1]heptane-endo-3-carboxylic acid 11##STR141##

A solution of 5.5 g of the above ester 10a in 50 ml of 10% solution ofpotassium hydroxide in methanol is stirred at room temperature for 1hour. The mixture is acidified with diluted hydrochloric acid and thenextracted with ethyl acetate. The extract is washed with water, driedover sodium sulfate and evaporated under reduced pressure. Thecrystalline residue is recrystallized from benzene and then from etherto give 3.95 g the titled compound 11 in 77.0% yield, of which thephysical constants are as follows. Mp. 103° C.

IR(Nujol): νmax 2240, 1702 cm⁻¹

NMR(CDCl₃): δ ppm 1.4˜2.1(4H, m), 2.2˜2.8(4H, m), 4.41(1H, d, J=3 Hz),4.85(1H, d, J=5 Hz), 10.29(1H, s).

Anal. Calcd. (%) for C₉ H₁₁ NO₃ : C, 59.66; H, 6.12; N, 7.73. Found (%):C, 59.62; H, 6.11; N, 7.77.

(3)Exo-2-cyanomethyl-endo-3-(tert-butoxycarbonylamino)-7-oxabicyclo[2.2.1]heptane12a ##STR142##

In the same manner as in Example 47(2), 4.6 g of the above carboxylicacid 11 is treated with tert-butanol in the place of benzyl alcohol togive 3.45 g of the titled compound 12a in 53.9% yield. The physicalconstants are as follows.

IR(Film): νmax 3345, 2250, 1703 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.43(9H, s), 1.5˜2.0(5H, m), 2.4˜2.8(2H, m),3.50(1H, m), 4.37(1H, d, J=5 Hz), 4.63(1H, t, J=4 Hz), 4.80(1H, s).

(4)Exo-2-formylmethyl-endo-3-(tert-butoxycarbonylamino)-7-oxabicyclo[2.2.1]heptane13a ##STR143##

To a solution of 2.94 g of the above cyano derivative 12a in dry tolueneis dropwise added 13 ml of 1M aluminum diisobutyl hydride/hexanesolution at 20° C. in a stream of nitrogen. After the mixture is stirredat -20° C. for 6 hours, the reaction is stopped by the addition ofsaturated aqueous solution of ammonium chloride. The solid is dissolvedwith diluted hydrochloric acid and the two layers are separated. Theaqueous layer is extracted with ethyl acetate and then the combinedorganic layers are washed with water, dried over sodium sulfate, andevaporated under reduced pressure. It is realized from the thin layerchromatogram and NMR spectrum that the 2.05 g of the residue iscontaminated with the starting material. A small amount of oily residueis purified by chromatography and eluted with hexane-ethyl acetate (2:1)to give the titled compound 13a, of which the physical constants are asfollows.

IR(Film): νmax 3330, 1705, 1515 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.40(9H, s), 1.5˜2.0(5H, m), 2.71(2H, d, J=7 Hz),3.46(1H, m), 4.10(1H, d, J=4 Hz), 4.63(1H, t, J=4 Hz), 4.96(1H, s),9.76(1H, s)

The remaining residue is used in the next reaction without purification.

(5) Methyl5(Z)-7-[endo-3-(tert-butoxycarbonylamino)-7-oxabicyclo[2.2.1]hept-exo-2-yl]-5-heptenoateII b-ab(2R*-t) ##STR144##

In the same manner as in Example 47(6), 813 mg of the above crudealdehyde 13a is treated to give 300 mg of the carboxylic acid IIb-bb(2R*-t), of which the physical constant is as follows.

¹ H-NMR(CDCl₃): δ ppm 1.45(9H, s), 1.2˜1.9(7H, m), 1.9˜2.5(6H, m),3.49(1H, m), 4.14(1H, d, J=5 Hz), 4.61(1H, t, J=3 Hz), 5.39(2H, m),8.35(1H, s).

In the same manner as in Example 47(6), 1.05 g of the carboxylic acid IIb-bb(2R*-t) is esterified to give 0.95 g of the titled compound IIb-ab(2R*-t), of which the physical constants are as follows.

IR: νmax (Film) 3340, 1740, 1713, 1170 cm⁻¹.

¹ H-NMR (CDCl₃): δ ppm 1.42(9H, s), 1.1˜1.9(6H, m), 1.9˜2.4(7H, m),3.47(1H, m), 4.11(1H, d, J=5 Hz), 4.61(1H, t, J=3 Hz), 4.82(1H, d, J=6Hz), 5.37(2H, m).

(6) Methyl5(Z)-7-[endo-3-benzenesulfonamido-7-oxabicyclo[2.2.1]hept-exo-2-yl]-5-heptenoateI b-aa(2R*-t) ##STR145##

In the same manner as in Example 48(1), 0.90 g of the above BOCderivative II b-ab(2R*-t) is treated to give the trifluoroacetate salt,quantitatively. In the same manner as in Example 48(1), 601 mg of thesalt is allowed to react to give 361 mg of the titled compound Ib-aa(2R*-t), of which the physical constants are as follows. (Yield67.9%: from the BOC derivative).

IR (Film): νmax 3270, 1735, 1160 cm⁻¹.

¹ H-NMR (CDCl₃): δ ppm 1.0˜2.4(13H, m), 3.02(1H, m), 3.69(3H, s),4.09(1H, d, J=4 Hz), 4.46(1H, t, J=3 Hz), 5.17(2H, m), 5.64(1H, d, J=5Hz), 7.60(3H, m), 7.93(2H, m).

(7)5(Z)-7-[Endo-3-benzenesulfonamido-7-oxabicyclo[2.2.1]heptexo-2-yl]-5-heptenoicacid I b-ba(2R*-t) and its sodium salt I b-ca(2R*-t) ##STR146##

1 Carboxylic acid I b-ba(2R*-t)

In the same manner as in Example 47(8), 335 mg of the above ester Ib-aa(2R*-t) is treated to give 310 mg of the titled compound Ib-ba(2R*-t), of which the physical constants are as follows.

IR(Film): νmax 3260, 1706, 1157 cm⁻¹.

¹ H-NMR(CDCl₃): δ ppm 1.2˜2.4(13H, m), 3.01(1H, m), 4.07(1H, d, J=4 Hz),4.41(1H, t, J=5 Hz), 5.16(2H, m), 5.64(1H, d, J=6 Hz), 7.55(3H, m),7.88(2H, m).

2 Sodium salt I b-ca(2R*-t)

To a solution of 255 mg of the above carboxylic acid I b-ba(2R*-t) in 2ml of methanol is added 3.0 ml of 0.21M solution of sodium methoxide inmethanol and the mixture is evaporated under reduced pressure. Theresidue is dissolved in water to which active carbon is added, and themixture is filtered. The filtrate is freeze-dried to give 240 mg of thetitled compound I b-ca(2R*-t), of which the physical constant is asfollows.

IR (KBr): νmax 3410, 3260, 1560, 1320, 1155 cm⁻¹.

I-9 EXAMPLE 50 ##STR147## 5(Z)-Methyl7-[endo-3-carboxy-7-oxabicyclo[2.2.1]hept-endo-2-yl]-5-heptenoate 2

Jones' reagent was added dropwise to a solution of 1.47 g of 5(Z)-methyl7-[endo-3-(hydroxymethyl)-7-oxabicyclo[2.2.1]hept-endo-2-yl]-5-heptenoate1 [P. W. Spraque, etal., J. Med. Chem., 28, 1580, (1985)] in acetone (15ml) with cooling in ice until the brown color persisted. Ice-water wasadded. The mixture was extracted with ethyl acetate. The extracts werewashed with water, dried over anhydrous sodium sulfate and concentratedunder reduced pressure. The residue was chromatographed on silica gel(50 g) in hexane-ethyl acetate (1:3). 0.877 g (56.7%). NMR: δ ppm(CDCl₃); 1.4-2.6(13H), 3.09(1H, dd, J=5, 11 Hz), 3.68(3H,s), 4.52(1H, t,J=3 Hz), 5.35(2H, m), 8.1(1H, br. s).

5(Z)-7-[endo-3-(tert-butoxycarbonylamino)-7-oxabicyclo[2.2.1]hept-endo-2-yl]-5-heptenoicacid methyl ester II b(2S*-c)

Yield 49.6%. IR: νmax (Film) 3370, 1739, 1716, 1698 cm⁻¹. NMR: δ ppm(CDCl₃); 1.44(9H,s), 1.5-2.5(13H), 3.67(3H,s), 4.05(1H, m), 4.47(1H,m),4.55(1H,m), 4.57(1H,m,NH), 5.34(2H,m).

5(Z)-7-[endo-3-benzenesulfonamido-7-oxabicyclo[2.2.1]hept-endo-2-yl]-5-heptenoicacid methyl ester I b-aa(2S*-c)

Yield 56.4%. IR νmax(Film) 3300, 1737, 1343, 1163 cm⁻¹. NMR: δ ppm(CDCl₃) 1.4-2.4(13H), 3.60(1H,m), 3.69(3H,s), 4.33(2H,m), 5.25(2H,m),5.35(1H,m), 7.55(3H,m), 7.88(2H,m).

5(Z)-7-[endo-3-benzenesulfonamido-7-oxabicyclo[2.2.1]hept-endo-2-yl]-5-heptenoicacid I b-ba(2S*-c) and its salt I b-ca(2S*-c)

Free caroboxylic acid: Yield 94.0%.

IR νmax (film) 3290, 1709, 1340, 1162 cm⁻¹. NMR: δ ppm (CDCl₃)1.4-2.5(13H,m), 3.66(1H, m), 4.27(1H,m), 4.38(1H,m), 5.27(2H, m),5.65(1H,d,J=9 Hz), 7.58(3H,m), 7.90(2H,m), 8.14(1H,br.s),

Na-salt IR νmax (KBr) 3430, 1558, 1339, 1158 cm⁻¹.

II EXAMPLE 1

(1) Preparation of 2-allyl-3-hydroxyiminobicyclo[2.2.1]octane 10##STR148##

To a solution of 3.48 g (25 mM) of the startingbicyclo[2.2.2]octan-2-one oxime 10 [H. K. Hall, Jr. etal., J. Am. Chem.Soc., 82, 1209, (1960)] in 63 ml of tetrahydrofuran (hereinafterabbreviated to THF) is added 40 ml (60 mM) of n-butyl lithium (1.5M inhexane) directly at -70° C. Large amount of white precipitate isdeposited and the mixture is stirred at the same temperature for about10 minutes, and then the temperature is gradually raised up to roomtemperature. The white precipitate is dissolved within an hour at roomtemperature and then 2.58 ml (30 mM) of allyl bromide is added thereto.After stirred for about an hour, the mixture is poured into aqueousammonium chloride, salted-out and extracted with ether. Then etherextract is dried over magnesium sulfate (hereinafter referred as"dried"), and evaporated to give the compound 11 as crude whitecrystals. Thin layer chromatogram of this product shows only one spot ofthe aimed compound (Yield 90%). This is recrystallized from a mixture ofhexane and ether to give the pure product 11(a mixture of E andZ-forms), mp. 124°-125° C. (a portion melts and is isomerized at 103°C.)

Anal. Calcd. (%) for C₁₁ H₁₇ NO: C, 73.70; H, 9.56; N, 7.81; Found (%):C, 73.64; H, 9.63; N, 7.89.

NMR: δ(CDCl₃) 1.0˜3.83(m, 14H), 4.90˜5.20(m, 2H), 5.60˜6.10(m, 1H).

IR: νmax (CHCl₃) 3590, 3250, 2935, 2860, 1640, 1460, 1440, 1395˜1300,1120, 1090, 990, 915, 850 cm⁻¹.

(2) Preparation of 2-allyl-3-aminobicyclo[2.2.2]octane 12 ##STR149##

To a solution of 1.79 g (10 mM) of the above-prepared allyl oxime 11 in20 ml of THF is added 836 mg of lithium aluminium hydride and themixture is refluxed with heating for 4 hours. Aqueous ether is added tothe mixture under ice-cooling to decompose lithium aluminum hydrideremaining unchanged. Then the precipitate of aluminum hydroxide isremoved by filtration and washed with ether. The organic layer is driedand evaporated to give 1.352 g of the compound 12 as white crudecrystals. This product is converted into the sulfonamide derivative inthe next step without isolation and purification.

(3) Preparation of 2-allyl-3-benzenesulfonamidobicyclo[2.2.2]octane 13a##STR150##

To a solution of 1.352 g (8.2 mM) of the compound 12 prepared above in15 ml of dichloromethane are added 1.37 ml (9.83 mM) of triethylamineand then 1.25 ml (9.80 mM) of benzenesulfonyl chloride under stirringand ice-cooling. The mixture is allowed to react at room temperature forabout an hour, poured into ice-water, and extracted with ethyl acetate.The organic layer is washed with a cold diluted aqueous hydrochloricacid, a cold sodium hydrogencarbonate aqueous solution and water, dried,and evaporated to give an oily material (partially crystals are formed).The NMR spectra show the characteristic absorptions spectrum of transform (δ; 2.90, t) and cis from (δ; 3.86-4.30, m), of which the ratio isabout 2:1. This mixture is chromatographed on a silica gel column [Lobar(Merck)] and the resulting crystals are recrystallized from a mixture ofn-hexane and ether to give 850 mg of the trans sulfonamide derivative in51.1% yield.

Mp. 114°-115° C.

Anal. Calcd. (%) for C₁₇ H₂₃ NSO₂ : C, 66.85; H, 7.59; N, 4.59; S,10.50; Found (%): C, 66.84; H, 7.55; N, 4.69; S, 10.50.

IR: νmax (CHCl₃) 3390, 2940, 2855, 1640, 1445, 1330, 1160, 1095, 1000,960, 915 cm⁻¹.

NMR: δ(CDCl₃) 1.0˜2.2(m, 12H), 2.90(t-type m, 1H), 4.70˜5.10(m, 3H),5.30˜5.80(m, 1H), 7.47˜8.06(m, 5H).

(4) Preparation of 2α,3β-2-(2,3-epoxypropyl)-3-benzenesulfonamidobicyclo[2.2.2]octane 14a and2α, 3β-3-benzenesulfonamidobicyclo[2.2.2]octan-2-acetaldehyde II e-a##STR151##

To a solution of 597 mg (1.95 mM) of the above prepared allylsulfonamide13a in 6 ml of chloroform is added 516 mg (3 mM) of m-chloroperbenzoicacid under ice-cooling and the mixture is allowed to react at roomtemperature for several hours. Then, the reaction mixture is poured intoa cold sodium hydrogensulfate aqueous solution and extracted with ethylacetate. The organic layer is washed with a sodium hydrogencarbonateaqueous solution and water, dried, and evaporated to give 670 mg of theepoxide 14a as an oily crude product.

NMR: δ(CDCl₃) 1.20˜2.00(m, 13H), 2.26˜3.10(m, 4H), 5.10˜5.35(m, 1H),7.40˜8.00(m, 5H).

To a solution of 625 mg (1.95 mM) of the epoxide 14a in 11 ml of amixture of dioxane and water (10:3) is added 827 mg (3.9 mM) of periodicacid (HIO₄ 2H₂ O) is added under ice-cooling and the mixture is allowedto react at room temperature for about 3 hours. The reaction mixture ispoured into a saturated sodium chloride aqueous solution and extractedwith ether. The organic layer is dried and evaporated to give 598 mg ofthe crude aldehyde II e-a.

NMR: δ(CDCl₃) 1.13˜2.00(m, 12H), 2.40(dd, 2H, J=6.0 Hz), 2.82(m, 1H),5.47(d, 1H, J=6.7 Hz), 6.40˜8.00(m, 5H), 9.57(m, 1H).

This product is used directly in the next reaction without isolation andpurification.

(5) 1 Preparation of methyl 2α,3β-7-(3-benzenesulfonamidobicyclo[2.2.2]oct-2-yl)-5(Z)-heptenoate Ie-aa(2S*-t) ##STR152##

Wittig reagent which is used for the coupling reaction is prepared inaccordance with the Corey's method as follows. Sodium hydride is addedto a solution of 2.75 g (6.2 mM) of 4-carboxybutyl triphenylphosphoniumbromide in 11.7 ml of dimethylsulfoxide (hereinafter abbreviated toDMSO) in an atmosphere of nitrogen and heated at about 70° C. for anhour in order to dissolve the sodium hydride. The reaction mixture iscooled to 10° C. (so as to give no solid) and a solution of 598 mg (1.95mM) of the aldehyde II e-a prepared above in 11 ml of DMSO is dropwiseadded thereto. The reaction temperature rises to about 25°-30° C. andthe reaction rapidly proceeds to completion. After stirred at roomtemperature for an hour, the reaction mixture is poured into a saturatedsodium chloride aqueous solution and extracted with ethyl acetate. DMSOis thoroughly removed by washing with water and the organic layer isdried and evaporated to give the crude oily substance, which isdissolved in THF to esterify with diazomethane. The product ischromatographed on a silica gel column [Lobar (Merck)] to give 459 mg ofthe compound I e-aa(2S*-t) as pure specimen in 58.2% yield andadditional 86 mg of the same compound with a small amount ofcontaminants in 10.9% yield. The NMR and IR data of the former compoundare as follows.

NMR: δ(CDCl₃) 1.0˜2.10(m, 17H), 2.27(t, 2H, J=7.5 Hz), 2.83(m, 1H),3.66(s, 3H), 4.93˜5.40(m, 3H), 7.40˜8.03(m, 5H).

IR: νmax (CHCl₃) 3370, 2925, 2850, 1720, 1440, 1320, 1150, 1090, 960,905, 860 cm⁻¹.

2 Preparation of the sodium salt I e-ac(2S*-t)

To a solution of 600 mg (1.48 mM) of the above prepared ester Ie-aa(2S*-t) in 7.1 ml of ethanol is added 2.96 ml of 1N potassiumhydroxide aqueous solution under cooling, and the mixture is allowed tostand at room temperature overnight until the reaction is completed.Then, the reaction mixture is poured into cold water and the aqueouslayer is washed with ethyl acetate to remove the starting materialremaining unchanged, acidified with hydrochloric acid, salted-out, andextracted with ethyl acetate. The organic layer is washed with water,dried, and evaporated with a high performance vacuum pump. The residue,of which the purity is estimated 95% (the remaining is solvent), istreated with 1N sodium hydroxide to give the sodium salt. This isfreeze-dried to give an authentic specimen for analyses.

Anal. Calcd. (%) for C₂₁ H₂₈ NSO₄ Na.0.2H₂ O: C, 60.47; H, 6.86; N,3.36; S, 7.69; Na, 5.51; Found (%): C, 60.33; H, 7.11; N, 3.33; S, 7.67;Na, 60.4.

IR: νmax (KBr) 3440, 3290, 2950, 2880, 1565, 1450, 1410, 1320˜1310,1160, 1095, 968, 920, 875 cm⁻¹.

NMR: δ ext.TMS (D₂ O) 1.30˜2.47(m, 17H), 2.58(t, J=7.5 Hz, 2H), 3.25(m,1H), 5.40˜5.95(m, 2H), 7.80˜8.50(m, 5H).

III-1 EXAMPLE 1

(1) (dl)-(1β, 2α, 3α, 5β)-2-Hydroxyethyl-3-hydroxybicyclo[3.1.0]hexane2b-a

13.1 g (0.2 gram atom) of zinc dust is added to a hot solution of 80 mgof silver acetate in 200 ml of acetic acid; acetic acid is then removedand the residue is washed with ether to give a zinc-silver couple. To asuspension of the zinc-silver couple thus prepared in 120 ml of ether isadded 26.8 g (0.1 mole) of methylene iodide at such a rate that gentlerefluxing is kept. The mixture is heated for an hour and then, asolution of 6.4 g (53.3 mmole) of (dl)-2-hydroxycyclopent-4-enylethanol1a(2R*) [M. R. Vskokovic, J. Am. Chem. Soc., 95, 7171, (1973)] in 10 mlof ether is dropwise added thereto. The reaction mixture is allowed toreact under refluxing and stirring for additional 4 hours. After cooled,the reaction mixture is poured into a saturated ammonium chlorideaqueous solution and the product is extracted with ethyl acetate. Theethyl acetate layer is washed with a saturated sodium chloride aqueoussolution, dried over anhydrous magnesium sulfate and evaporated. Theresidue is purified by column chromatography on silica gel with amixture of benzene and ethyl acetate (1:1) to give 3.98 g of the titledcompound 2b-a as an eluate in 56% yield.

¹ H-NMR: δ(CDCl₃); 0.0-0.5(m, 1H), 0.5-0.8(m, 1H), 1.1-1.14(m, 2H),1.5-2.0(m, 3H), 2.0-2.8(m, 4H), 3.55-4.1(m, 2H), 4.1-4.35(m, 1H) ppm.IR: νmax (CHCl₃); 3450 cm⁻¹.

(2) (dl)-(1β, 2α, 3α,5β)-3-Hydroxy-2-triphenylmethoxyethylbicyclo[3.1.0]hexane 2a-a(3R*-β)

A solution of 2.1 g (14.8 mmole) of (dl)-(1β, 2α, 3α,5β)-2-hydroxyethyl-3-hydroxybicyclo[3.1.0]hexane 2b-a and 4.36 g (15.6mmole) of triphenylmethyl chloride in 50 ml of dichloromethane are added2.5 ml (17.8 mmole) of triethylamine and then 100 mg of4-dimethylaminopyridine under ice-cooling, and the mixture is allowed toreact under ice-cooling for 30 minutes, and then at room temperature foradditional 20 hours. The product is extracted with dichloromethane. Thedichloromethane layer is washed with a saturated sodium chloride aqueoussolution, dried over anhydrous magnesium sulfate and evaporated. Theresidue is purified by column chromatography on silica gel with amixture of benzene and ethyl acetate (2:1) to give 5.46 g of the titledcompound 2a-a(2R*-β) as an eluate in 95.7% yield.

¹ H-NMR: δ(CDCl₃); 0.1-0.4(m, 1H), 0.5-0.8(m, 1H), 1.0-1.35(m, 2H),1.4-2.5(m, 6H), 2.95-3.28(m, 1H), 3.28-3.55(m, 1H), 4.10(t, J=6 Hz, 1H),7.0-7.6(m, 15H) ppm.

IR: νmax (CHCl₃); 3450 cm⁻¹.

(3) (dl)-(cis)-2-Hydroxycyclopent-4-enylethanol triphenylmethyl ether1b-a(2R*)

To a solution of 14 g (109 mmole) of(dl)-2-hydroxycyclopent-4-enylethanol 1a(2R*) in 500 ml ofdichloromethane is added a solution of 32 g (144 mmole) oftriphenylmethyl chloride in 100 ml of dichloromethane and then 19.8 ml(142 mmole) of triethylamine and 300 mg of 4-dimethylaminopyridine areadded, and the mixture is allowed to react at room temperature for 20hours. The product is extracted with dichloromethane. Thedichloromethane layer is washed with diluted hydrochloric acid, asaturated sodium hydrogencarbonate aqueous solution and a saturatedsodium chloride aqueous solution, dried over anhydrous magensiumsulfate, and evaporated. The residue is purified by columnchromatography on silica gel with a mixture of n-hexane and ethylacetate (4:1) to give 38.63 g of the titled compound 1b-a(2R*) as aneluate in 96% yield.

¹ H-NMR: δ(CDCl₃); 1.5-2.0(m, 2H), 2.15-2.85(m, 3H), 3.02-3.5(m, 2H),4.2-4.5(m, 1H), 5.4-5.6(m, 1H), 5.6-5.7(m, 1H), 7.15-7.65(m, 15H) ppm.

IR: νmax (CHCl₃); 3450 cm⁻¹.

(4) (dl)-(trans)-2-Benzoyloxycyclopent-4-enylethanol triphenylmethylether 1-a(2S*)

To a cooled solution with ice-bath of 1.86 g (5 mmole) of(dl)-(cis)-2-hydroxycyclopent-4-enylethanol triphenylmethyl ether1b-a(2R*), 2.62 g (10 mmole) of triphenylphosphine and 1.22 g (10 mmole)of benzoic acid in 100 ml of tetrahydrofuran is added 1.74 g (10 mmole)of diethyl azodicarboxylate and the mixture is allowed to react at roomtemperature for 15 minutes. Then is added 1 ml of methanol and themixture is evaporated. Ether is added to the residue and resultinginsoluble substance is removed by filtration. The ether soluble productis purified by column chromatography on silica gel with a mixture ofn-hexane and ethyl acetate (9:1) to give 1.32 g of the titled compound1-a(2S*) as an eluate in 55.6% yield. Further, as a nonpolar product,0.72 g of (dl)-cyclopenta-1,4-dienylethanol triphenylmethyl ether isobtained in 40.9% yield.

¹ H-NMR: δ(CDCl₃); 1.55-1.95(m, 2H), 2.33(d.d, J=12, 2 Hz, 1H),2.81(d.d, J=12, 5 Hz, 1H), 2.9-3.4(m, 3H), 5.13-5.36(m, 1H),5.45-5.70(m, 2H), 6.95-8.15(m, 20H) ppm.

IR: νmax (CHCl₃); 1710 cm⁻¹.

(5) (dl)-(trans)-2-Hydroxycyclopent-4-enylethanol triphenylmethyl ether1b-a(2S*)

A solution of 1.32 g (2.8 mmole) of(dl)-(trans)-2-benzoyloxy-cyclopent-4-enylethanol triphenylmethyl ether1-a(2S*) and 8.0 g (5.79 mmole) of potassium carbonate in a mixture of16 ml of methanol, 4 ml of water and 10 ml tetrahydrofuran is refluxedwith heating for 5 hours. After cooled, the product is extracted withdichloromethane. The dichloromethane layer is washed with a saturatedsodium chloride aqueous solution and dried over anhydrous magnesiumsulfate, and evaporated. The residue is purified by columnchromatography on silica gel with a mixture of benzene and ethyl acetate(2:1) to give 0.98 g of the titled compound 1b-a(2S*) as an eluate.

¹ H-NMR: δ(CDCl₃); 1.83-1.50(m, 3H), 2.06-2.40(m, 1H), 2.47-2.83(m, 2H),3.05-3.40(m, 2H), 4.0-4.23(m, 1H), 5.43-5.7(m, 2H), 7.10-7.65(m, 15H)ppm.

IR: νmax (CHCl₃); 3450 cm⁻¹.

(6) (dl)-(1α, 2α, 3β,5α)-3-Hydroxy-2-triphenylmethoxyethylbicyclo[3.1.0]hexane 2a-a(3S*-α)

11.5 g (176 milli gram atom) of zinc dust is added to a hot solution of100 mg of silver acetate in 80 ml of acetic acid; acetic acid is thenremoved and the residue is washed with ether to give a zinc-silvercouple. To a solution of the zinc-silver couple thus prepared in 60 mlof ether is added 23.57 g (88 mmole) of methylene iodide at such a ratethat gentle refluxing is kept. After the mixture is heated for an hour,a solution of 8.2 g (22 mmole) of(dl)-trans-2-hydroxycyclopent-4-enylethanol triphenylmethyl ether1b-a(2S*) in 10 ml of ether is dropwise added thereto. The reactionmixture is refluxed with heating and stirring for additional 4 hours.After cooled, the reaction mixture is poured into a saturated ammoniumchloride aqueous solution and the product is extracted with ethylacetate. The ethyl acetate layer is washed with a saturated sodiumchloride aqueous solution, dried over anhydrous magnesium sulfate andevaporated. The residue is purified by column chromatography on silicagel with a mixture of n-hexane and ethyl acetate (9:1→4:1) to give 7.5 gof the titled compound 2a-a(3S*-α) as an eluate in 87% yield.

¹ H-NMR: δ(CDCl₃); 0.33-0.66(m, 2H), 0.86-1.30(m, 2H), 1.34-(s, 3H),1.43-1.77(m, 3H), 1.81-2.27(m, 2H), 3.28(t, J=6 Hz, 2H), 3.95(d, J=6 Hz,1H), 7.2-7.63(m, 15H) ppm.

IR: νmax (CHCl₃); 3450 cm⁻¹.

(7) (dl)-cis-2-Acetoxycyclopent-4-enylethanol triphenylmethyl ether1-a(2R*)

To a solution of 15.3 g (41.3 mmole) of(dl)-cis-2-hydroxycyclopent-4-enylethanol triphenylmethyl ether1b-a(2R*) in 60 ml of pyridine are added 40 ml of acetic anhydride and0.1 g of 4-dimethylaminopyridine and the mixture is allowed to react atroom temperature for 2 hours. Solvent and excess reagent are evaporatedunder reduced pressure and then the product is extracted with ethylacetate. The ethyl acetate layer is washed with a diluted sodiumhydrogensulfate aqueous solution, a saturated sodium hydrogencarbonateaqueous solution and a saturated sodium chloride aqueous solution, driedover anhydrous magnesium sulfate, and evaporated. The residue ispurified by column chromatography on silica gel with a mixture ofn-hexane and ethyl acetate (9:1) to give 16.87 g of the titled compound1-a(2R*) as a eluate in 99.0% yield.

¹ H-NMR: δ(CDCl₃); 1.5-3.05(m, 5H), 1.9(s, 3H), 3.14(t, J=6 Hz, 2H),5.2-5.45(m, 1H), 5.6(s, 2H), 7.05-7.9(m,15H) ppm.

IR: νmax (CHCl₃); 1720 cm⁻¹.

(8) (dl)-(1α, 2α, 3α,5α)-6,6-Dibromo-3-acetoxy-2-triphenylmethoxyethylbicyclo[3.1.0]hexane2-c(3R*-α)

To a solution of 16.5 g (40 mmole) ofcis-2-acetoxycyclopent-3-enylethanol triphenylmethyl ether 1-a(2R*) in80 ml of dichloromethane are added 14 ml (160 mmole) of bromoform, 1 gof triethylbenzylammonium chloride and 50 ml of 40% sodium hydroxideaqueous solution. The mixture is stirred well and allowed to react at50° C. for 20 hours. After cooled, the mixture is diluted with 200 ml ofdichloromethane and insoluble material is filtrated off through celite.The filtrate is washed with water and a saturated sodium chlorideaqueous solution, dried over anhydrous magnesium sulfate, andevaporated. The residue is purified by column chromatography on silicagel with a mixture of n-hexane and ethyl acetate (9:1) to give 19.6 g ofthe titled compound 2-c (3R*-α) as an eluate in 84% yield.

¹ H-NMR: δ(CDCl₃); 1.5-2.55(m, 7H), 1.92(s, 3H), 3.16(t, J=6 Hz, 2H),5.06-5.3(m, 1H), 7.1-7.7(m,15H) ppm.

IR: νmax (CHCl₃); 1735 cm⁻¹.

(9) (dl)-(1α, 2α, 3α,5α)-3-Acetoxy-6,6-dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexane2-b(3R*-α)

To a suspension of 26.3 g (216 mmole) of copper(I) thiocyanate in 250 mlof ether cooled at a temperature of -50° to -60° C. is dropwise added283 ml (396 mmole) of 1.4N solution of methyl lithium in ether whilekeeping the reaction temperature below -50° C. The reaction temperatureis raised to 0° C. over a period of 30 minutes and then lowered to -20°C. To the mixture are added a solution of 11.5 g (19 mmole) of (dl)-(1α,2α, 3α,5α)-3-acetoxy-6,6-dibromo-2-triphenylmethoxyethylbicyclo[3.1.0]hexane2-c(3R*-α) in 50 ml of ether and 8.56 ml (47.5 mmole) ofhexamethylphosphoramide and the mixture is allowed to react at -20° C.for an hour. After the above mixture is cooled to -50° C. again, excessmethyl iodide is added, and then the mixture is stirred for 10 minutes.To the mixture, which is cooled to -70° C., is added a saturatedammonium chloride aqueous solution and the resulting insoluble materialis filtrated off through celite. The filtrate is washed with a dilutedammonia water and a saturated sodium chloride aqueous solution, driedover anhydrous magnesium sulfate, and evaporated to give a titledcompound 2-b(3R*-α), which is used in the following reaction withoutpurification.

¹ H-NMR: δ(CDCl₃); 0.93(s, 6H), 0.8-1.4(m, 3H), 1.4-2.2(m, 4H), 1.92(s,3H), 3.12(t, J=6 Hz, 2H), 4.95-5.2(m, 1H), 7.05-7.7(m, 15H) ppm.

IR: νmax (CHCl₃); 1725 cm⁻¹.

(10) (dl)-(1α, 2α, 3α,5α)-6,6-Dimethyl-3-hydroxy-2-triphenylmethoxyethylbicyclo[3.1.0]hexane2a-b(3R*-α)

To a solution of the above prepared crude product of (dl)-(1α, 2α, 3α,5α)-3-acetoxy-6,6-dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexane2-b(3R*-α) in a mixture of 60 ml of methanol and 60 ml oftetrahydrofuran is added 29 ml (58 mmole) of 2N sodium hydroxide aqueoussolution and the mixture is refluxed with heating for 3 hours, andevaporated under reduced pressure. The residue is extracted with ethylacetate and the ethyl acetate layer is washed with a saturated sodiumchloride aqueous solution, dried over anhydrous magnesium sulfate, andevaporated. The residue is purified by column chromatography on silicagel with a mixture of n-hexane and ethyl acetate (5:1) containing 2%triethylamine to give 7.41 g of the titled compound 2a-b(3R*-α) as aneluate. (in 95% yield from the compound 2-c(3R*-α)).

¹ H-NMR: δ(CDCl₃); 0.87(s, 3H), 0.93(s, 3H), 0.75-1.1(m, 1H), 1.1-1.4(m,1H), 1.5-2.1(m, 1H), 2.44(br.s, 1H), 3.0-3.43(m, 2H), 4.12(m, 1H),7.0-7.8(m, 15H) ppm.

IR: νmax (CHCl₃); 3420 cm⁻¹.

(11) (dl)-(1α, 2α,5α)-6,6-Dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexan-3-one 4-b(α)

A solution of 0.74 ml (8.3 mmole) of oxalyl chloride in 20 ml ofdichloromethane, cooled to -78° C., is added to a solution of 1.2 ml(16.9 mmole) of dimethylsulfoxide in 1 ml of dichloromethane and themixture is stirred for 5 minutes. To the mixture is added a solution of2.9 g (7.03 mmole) of (dl)-(1α, 2α, 3α,5α)-6,6-dimethyl-3-hydroxy-2-triphenylmethoxyethylbicyclo[3.1.0]hexane2a-b(3R*-α) in 5 ml of dichloromethane and the resulting mixture isallowed to react at -60° C. for 20 minutes and then 6.86 ml (49.2 mmole)of triethylamine is added thereto. The temperature of the reactionmixture is gradually raised up to room temperature and then the productis extracted with dichloromethane. The dichloromethane layer is washedwith 1N hydrochloric acid, a saturated sodium hydrogencarbonate aqueoussolution and a saturated sodium chloride aqueous solution, dried overanhydrous magnesium sulfate, and evaporated. The residue is purified bycolumn chromatography on silica gel with a mixture of n-hexane and ethylacetate (2:1) to give 2.86 g of the titled compound 4-b(α) in 99% yield.

¹ H-NMR: δ(CDCl₃); 0.82(s, 3H), 1.00(s, 3H), 0.8-1.3(m, 2H), 1.4-2.3(m,4H), 2.48(d.d, J=20, 6 Hz, 1H), 3.2(t, J=6 Hz, 2H), 7.1-7.6(m, 15H) ppm.

IR: νmax (CHCl₃); 1725 cm⁻¹.

(12) (dl)-(1β, 2α,5β)-6,6-Dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexan-3-one 4-b(β)

A solution of 4.5 g (11 mole) of (dl)-(1α, 2α,5α)-6,6-dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexan-3-one 4-b(α)and 10.86 g (96.8 mmole) of potassium tert-butoxide in 110 ml ofdimethylsulfoxide is allowed to react at room temperature for 8 hours.The reaction mixture is poured into a solution of 12 g (0.2 mmole) ofacetic acid in 200 ml of dichloromethane cooled to -20° C. and then theproduct is extracted with ethyl acetate. The ethyl acetate layer iswashed with a saturated sodium hydrogencabonate aqueous solution and asaturated sodium chloride aqueous solution, dried over anhydrousmagnesium sulfate, and evaporated. The residue is purified by columnchromatography on silica gel with a mixture of benzene and ethyl acetate(9:1) to give 3.37 g of the titled compound 4-b(β) as an eluate in 75%yield.

¹ H-NMR: δ(CDCl₃); 0.80(s, 3H), 0.93(s, 3H), 1.0-1.68(m, 3H),2.0-2.93(m, 4H), 3.03-3.48(m, 2H), 7.10-7.60(m, 15H) ppm.

IR: νmax (CHCl₃); 1725 cm⁻¹.

(13) (dl)-(1β, 2α, 3α,5β)-6,6-Dimethyl-3-hydroxy-2-triphenylmethoxyethylbicyclo[3.1.0]hexane2a-b(3R*-β)

To a solution of 1.64 g (4 mmole) of (dl)-(1β, 2α,5β)-6,6-dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexan-3-one 4-b(β)in 164 ml of tetrahydrofuran is added 2.03 g (8 mmole) of lithiumtri-tert-butoxyaluminohydride and the mixture is allowed to react atroom temperature for 2.5 hours. The excess reagent is decomposed withaddition of water and then the product is extracted with ethyl acetate.The ethyl acetate layer is washed with a saturated sodium chlorideaqueous solution, dried over anhydrous magnesium sulfate, andevaporated. The residue is purified by column chromatography on silicagel with benzene eluent containing 1% triethylamine to give 988 mg ofthe titled compound 2a-b(3R*-β) as an eluate in 60% yield.

¹ H-NMR: δ(CDCl₃); 0.77-1.13(m, 2H), 0.88(s, 3H), 1.30(s, 3H),1.44-1.80(m, 2H), 1.80-2.22(m, 1H), 2.23-2.6(m, 2H), 3.23-3.52(m, 1H),4.55(t, J=9 Hz, 1H), 7.1-7.6(m, 15H) ppm.

IR: νmax (CHCl₃); 3430 cm⁻¹.

(14) (dl)-(1β, 2α, 3β,5β)-3-Azido-6,6-dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexane6-b(β)

To a solution of 988 mg (2.39 mmole) of (dl)-(1β, 2α, 3α,5β)-6,6-dimethyl-3-hydroxy-2-triphenyloxyethylbicyclo[3.1.0]hexane2a-b(3R*-β) in 10 ml of dichloromethane are added 0.2 ml (2.6 mmole) ofmethanesulfonyl chloride and 0.43 ml (3.12 mmole) of triethylamine underice-cooling, and the mixture is allowed to react at room temperature for30 minutes, and then the product is extracted with dichloromethane. Thedichloromethane layer is washed with a saturated sodium chloride aqueoussolution and evaporated. To a solution of the above prepared crude(dl)-(1β, 2α, 3α,5β)-6,6-dimethyl-3-methanesufonyloxy-2-triphenylmethoxyethylbicyclo[3.1.0]hexanein 20 ml of dimethylformamide is added 932 mg (14.4 mmole) of sodiumazide and the mixture is allowed to react at 75° C. for 7 hours. Aftercooled the product is extracted with ethyl acetate. The ethyl acetatelayer is washed with a saturated sodium chloride aqueous solution, driedover magnesium sulfate, and evaporated.

The residue is purified by column chromatography on silica gel with amixture of benzene and n-hexane eluent containing 1% triethylamine togive 835 mg of the titled compound 6-b(β) as an eluate in 80% yield.

¹ H-NMR: δ(CDCl₃); 0.73-1.2(m, 2H), 0.80(s, 3H), 0.97(s, 3H), 1.4-2.6(m,5H), 2.98-3.43(m, 3H), 7.1-7.63(m, 15H) ppm.

IR: νmax (CHCl₃); 2080 cm⁻¹.

(15) (dl)-(1β, 2α, 3β,5β)-3-Amino-6,6-dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexane7-b(3S*-β)

To a solution of 830 mg (1.9 mmole) of the above prepared (dl)-(1β, 2α,3β, 5β)-3-azido-6,6-dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexane6-b(β) in 8 ml of tetrahydrofuran is added 748 mg (2.85 mmole) oftriphenylphosphine and the mixture is allowed to react at 45° C. for 6hours.

To the reaction mixture is added 0.8 ml of water and the resultingmixture is allowed to react at 45° C. for additional 2 hours, and thenthe product is extracted with ethyl acetate. The ethyl acetate layer iswashed with a saturated sodium chloride aqueous solution, dried overanhydrous magnesium sulfate, and evaporated. The residue is purified bycolumn chromatography on silica gel with a mixture of benzene and ethylacetate (1:1) to give 873 mg of the titled compound 7-b(3S*-β) as aneluate. The product is used in the following reaction without furtherpurification.

(16) (dl)-(1β, 2α, 3β,5β)-6,6-Dimethyl-3-phenylsulfonylamino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane8-b(3S*-β)

To a solution of 873 mg of the above prepared crude (dl)-(1β, 2α, 3β,5β)-3-amino-6,6-dimethyl-2-triphenylmethoxyethylbicyclo[3.1.0]hexane7-b(3S*-β) in 10 ml of dichloromethane are added 0.36 ml (2.6 mmole) oftriethylamine and 0.28 ml (2.2 mmole) of benzenesulfonyl chloride andthe mixture is allowed to react at room temperature for 15 hours. Thereaction mixture is cooled with ice again and diluted aqueous ammonia isadded thereto in order to decompose excess reagent and then the productis extracted with dichloromethane. The dichloromethane layer is washedwith a saturated sodium chloride aqueous solution, dried over anhydrousmagnesium sulfate, and evaporated. The residue is purified by columnchromatography on silica gel with benzene eluent containing 2%triethylamine to give 574 mg of the titled compound 8-b(3S*-β) as aneluate (in 55% yield from the compound 6-b(β)).

¹ H-NMR: δ(CDCl₃); 0.63-1.07(m, 2H), 0.84(s, 3H), 0.89(s, 3H),1.1-2.4(m, 5H), 2.85-3.4(m, 3H), 4.65(d, J=9 Hz), 7.1-7.62(m, 18H),7.78-7.98(m, 2H) ppm.

IR: νmax (CHCl₃); 3360, 1320, 1155 cm⁻¹.

(17) (dl)-(1β, 2α, 5β)-2-Triphenylmethoxyethylbicyclo[3.1.0]hexan-3-one4-a(β)

To a solution of 5.62 g of (dl)-(1β, 2α, 3α,5β)-3-hydroxy-2-triphenylmethoxyethylbicyclo[3.1.0]hexane 2a-a(3R*-β) in30 ml of dimethylformamide is added 11.1 g (25.5 mmole) of pyridiniumdichromate under ice-cooling and the mixture is allowed to react at roomtemperature for 3 hours. The reaction mixture is poured into ice-waterand the product is extracted with ethyl acetate. The ethyl acetate layeris washed with a saturated sodium chloride aqueous solution, dried overanhydrous magnesium sulfate, and evaporated. The residue is purified bychromatography on silica gel with a mixture of benzene and ethyl acetate(9:1) to give 3.21 g of the titled compound 4-a(β) as an eluate in 56.8%yield.

¹ H-NMR: δ(CDCl₃); -0.35-0.0(m, 1H), 0.45-0.80(m, 1H), 0.9-1.8(m, 3H),1.95-2.4(m, 2H), 2.47-3.0(m, 2H), 3.0-3.4(m, 2H), 7.1-7.6(m, 15H) ppm.

IR: νmax (CHCl₃); 1725 cm⁻¹.

(18) (dl)-(1β, 2α,5β)-3-Hydroxyimino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane 5-a(β)

To a solution of 1.11 g (16.8 mmole) of potassium hydroxide in 65 ml ofmethanol is added 1.17 g (16.8 mmole) of hydroxylamine hydrochloride. Tothe mixture is added 3.21 g (8.4 mmole) of (dl)-(1β, 2α,5β)-2-triphenylmethoxyethylbicyclo[3.1.0]hexan-3-one 4-a(β) and theresulting mixture is allowed to react at room temperature for 3 hours.Water is added to the reaction mixture, which is extracted with ethylacetate. The ethyl acetate layer is washed with a saturated sodiumchloride aqueous solution, dried over magnesium sulfate, and evaporated.The residue is purified by column chromatography on silica gel with amixture of benzene and ethyl acetate (9:1) followed by recrystallizationfrom a mixture of benzene and n-hexane to give 3.30 g of the titledcompound 5-a(β) in 99% yield.

Mp. 58°-60° C.

¹ H-NMR: δ(CDCl₃); -0.4-0.2(m, 1H), 1.23-1.60(m, 1H), 1.13-1.67(m, 4H),1.95-2.30(m, 1H), 2.4(d, J=18 Hz, 1H), 2.8(d, J=18 Hz, 1H), 3.0-3.4(m,2H), 7.2-7.64(m, 15H), 8.08(s, 1H) ppm.

IR: νmax (CHCl₃); 3560 cm⁻¹.

(19) (dl)-(1β, 2α, 3β,5β)-3-Phenylsulfonylamino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane8-a(3S*-β) and (dl)-(1β, 2α, 3α,5β)-3-phenylsulfonylamino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane8-a(3R*-β)

To a solution of 2.91 g (7.31 mmole) of (dl)-(1β, 2α,5β)-3-hydroxyimino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane 5-a(β) in20 ml of tetrahydrofuran are added 1.92 g (8.77 mmole) ofdiphenyldisulfide and 3.27 ml (13.16 mmole) of n-tributylphosphine underice-cooling and the mixture is allowed to react at room temperature foran hour. After the reaction mixture is cooled to -70° C., 10 ml ofacetic acid and 1.65 g (26.32 mmole) of sodium cyanoborohydride is addedthereto. The resulting mixture is allowed to react at -78° C. for 10minutes and then the temperature is gradually raised up to roomtemperature. Sodium hydrogencarbonate is added to the reaction mixtureand then added water, and the product is extracted with ethyl acetate.The ethyl acetate layer is washed with a saturated sodium chlorideaqueous solution, dried over anhydrous magnesium sulfate, andevaporated. The residue is dissolved in 30 ml of dichloromethane, and4.2 ml (32.9 ml) of benzenesulfonyl chloride and 9.13 ml (65.8 ml) oftriethylamine are added to the solution under ice cooling and themixture is allowed to react at room temperature for 3 hours. The productis extracted with ethyl acetate and the ethyl acetate layer is washedwith a saturated sodium chloride aqueous solution, dried over anhydrousmagnesium sulfate, and evaporated. The residue is purified by columnchromatography on silica gel with a mixture of benzene and ethyl acetate(19:1) to give 2.18 g of the titled compounds 8-a(3S*-β) and 8-a(3R*-β)as a mixture.

(20) (dl)-(1β,2α,3β,5β) and(1β,2α,3α,5β)-2-Hydroxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane9-a(3S*-β) and 9-a(3R*-β)

A solution of 1.77 g (3.38 mmole) of a mixture of(dl)-(1β,2α,3β,5β)-3-phenylsulfonylamino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane8-a(3S*-β) and(dl)-(1β,2α,3α,5β)-3-phenylsulfonylamino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane8-a(3R*-β) in 50 ml of 80% aqueous acetic acid is refluxed with heatingfor 15 hours. After the solvent is evaporated, the product is extractedwith ethyl acetate. The ethyl acetate layer is washed with a saturatedsodium hydrogencarbonate aqueous solution and then a saturated sodiumchloride aqueous solution, dried over anhydrous magnesium sulfate, andevaporated to give the product consisting of (dl)-(1β,2α,3β,5β) and(1β,2α,3α,5β)-2-hydroxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane,and (dl)-(1β,2α,3β,5β) and(1β,2α,3α,5β)-2-acetoxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane.This product is dissolved in a solution of 716 mg of sodium carbonate ina mixture of 60 ml of methanol and 30 ml of water and the mixture isrefluxed with heating for 5 hours. After cooled, the reaction mixture ispoured into water and extracted with ethyl acetate. The ethyl acetatelayer is washed with a saturated sodium chloride aqueous solution, driedover anhydrous magnesium sulfate, and evaporated. The residue ispurified by column chromatography on silica gel with a mixture ofbenzene and ethyl acetate (2:1) to give 593 mg of the titled compoundsof(dl)-(1β,2α,3β,5β)-2-hydroxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane9-a(3S*-β) in 63% yield.

¹ H-NMR: δ(CDCl₃); -0.14-0.34(m, 2H), 0.94-2.34(m, 8H), 2.54-2.99(m,1H), 3.69(t, J=6 Hz, 2H), 5.39(d, J=8 Hz, 1H), 7.29-7.69(m, 3H),7.77-8.04(m, 2H) ppm.

IR: νmax(CHCl₃); 3650-3100, 3360, 1325, 1160 cm⁻¹. and 154 mg of(dl)-(1β,2α,3α,5β)-2-hydroxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane9-a(3R*-β) in 16% yield.

¹ H-NMR: δ(CDCl₃); -0.98-0.5(m, 2H), 0.94-2.22(m, 8H), 2.3-2.67(m, 1H),3.44-3.92(m, 3H), 5.08(d, J=8 Hz, 1H), 7.32-7.6(m, 3H), 7.67-8.00(m, 2H)ppm.

IR: νmax(CHCl₃); 3650-3100, 3360, 1335, 1150 cm⁻¹.

(21)(dl)-(1β,2α,3β,5β)-2-Formylmethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexaneII f-a(3S*-β)

To a solution of 0.2 ml (2.24 mmole) of oxalyl chloride in 10 ml ofdichloromethane, cooled to -78° C., is added 0.34 ml (4.8 mmole) ofdimethylsulfoxide and the mixture is stirred for 5 minutes. A solutionof 561 mg (1.99 mmol) of(dl)-(1β,2α,3β,5β)-2-hydroxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane9-a(3S*-β) in 10 ml of dichloromethane is added to the above mixture andthe resulting mixture is allowed to react at -60° C. for 15 minutes, andthen 3.34 ml (24 mmole) of triethylamine is added thereto. The reactiontemperature is gradually raised up to room temperature and the productis extracted with ethyl acetate. The ethyl acetate layer is washed withwater, 2N hydrochloric acid and a saturated sodium chloride aqueoussolution, dried over anhydrous magnesium sulfate, and evaporated to givethe titled compound II f-a(3S*-β), which is used in the followingreaction without further purification.

¹ H-NMR: δ(CDCl₃); -0.13-0.39(m, 2H), 0.98-1.98(m, 5H), 2.08-2.98(m,3H), 4.78-5.38(br.s, 1H), 7.33-7.65(m, 3H), 7.68-8.10(m, 2H), 9.80(s,1H) ppm.

IR: νmax(CHCl₃); 1720, 1340, 1320, 1160 cm⁻¹.

(22) (dl)-(1α,2α,5α)-2-Triphenylmethoxyethylbicyclo[3.1.0]hexan-3-one4-a(α)

The compound 4-a(α) is prepared in accordance with the manner of III-1,Example 1, (17).

NMR: δ(CDCl₃); 0.67-1.0(m, 1H), 1.07-2.09(m, 5H), 2.14-2.37(m, 2H),2.39-2.77(m, 1H), 3.21(t, J=6 Hz, 2H), 7.17-7.67(m, 15H) ppm.

IR: νmax(CHCl₃); 1730 cm⁻¹.

(23) The following compounds are prepared in accordance with the mannerof III-1, Example 1, (18).

1(dl)-(1α,2α,5α)-3-Hydroxyimino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane5-a(α)

NMR: δ(CDCl₃); (a mixture of syn and anti-form) 0.40-0.77(m, 1H),0.90-3.40(m, 8H), 3.23(t, J=6 Hz, 2H), 7.1-7.7(m, 16H) ppm.

IR: νmax(CHCl₃); 3580 cm⁻¹.

2(dl)-(1α,2α,5α)-6,6-Dimethyl-3-hydroxyimino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane5-b(α)

NMR: δ(CDCl₃); (a mixture of syn and anti-form) 0.83(s, 3H), 0.93(s,3H), 0.9-1.4(m, 2H), 1.6-2.1(m, 2H), 2.4-2.8(m, 3H), 3.21(m, 3H),7.0-7.6(m, 15H), 8.38(br.s, 1H) ppm.

NMR: δ(CDCl₃); 0.83(s, 3H), 0.9(s, 3H), 0.95-2.25(m, 4H), 2.27(d, J=18Hz, 1H), 2.58(d,d, J=18, 5 Hz, 1H), 3.03(m, 1H), 3.2(t, J=6 Hz, 2H),7.0-7.7(m, 16H) ppm.

IR: νmax(CHCl₃); 3490, 3325 cm⁻¹.

(24) The following compounds are prepared in accordance with the mannerof III-1, Example 1, (19).

1(dl)-(1α,2α,3β,5α)-3-Phenylsulfonylamino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane8-a(3S*-α)

NMR: δ(CDCl₃); 0.0-0.3(m, 1H), 0.4-0.7(m, 1H), 0.7-2.27(m, 7H), 3.0(t,J=6 Hz, 2H), 3.2-3.5(m, 1H), 4.43(d, J=6 Hz, 1H), 7.17-7.65(m, 19H),7.7-7.9(m, 2H) ppm.

IR: νmax(CHCl₃); 3360, 1330, 1160 cm⁻¹.

2(dl)-(1α,2α,3β,5α)-6,6-Dimethyl-3-phenylsulfonylamino-2-triphenylmethoxyethylbicyclo[3.1.0]hexane8-b(3S*-α)

NMR: δ(CDCl₃); 0.87(s, 3H), 0.93(s, 3H), 0.6-1.2(m, 5H), 1.2-2.2(m, 5H),2.9-3.2(m, 2H), 3.2-3.6(m, 1H), 4.98(d, J=8 Hz, 1H), 7.1-7.95(m, 18H),7.7-7.95(m, 19H) ppm.

IR: νmax(CHCl₃); 3360, 1320, 1160 cm⁻¹.

(25) The following compounds are prepared in accordance with the mannerof III-1, Example 1, (20).

1(dl)-(1α,2α,3β,5α)-2-Hydroxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane9-a(3S*-α)

NMR: δ(CDCl₃); 0.12-0.33(m, 1H), 0.43-0.77(m, 1H), 0.86-2.33(m, 9H),3.27-3.63(m, 1H), 4.8-5.05(d, J=6 Hz, 1H), 7.43-7.67(m, 3H), 7.8-8.0(m,2H) ppm.

IR: νmax(CHCl₃); 3360, 3250, 1330, 1160 cm⁻¹.

2(dl)-(1β,2α,3β,5β)-6,6-Dimethyl-2-hydroxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane9-b(3S*-β)

NMR: δ(CDCl₃); 0.63-1.3(m, 2H), 0.88(s, 3H), 0.95(s, 3H), 1.3-2.7(m,6H), 3.0-3.38(m, 1H), 3.68(t, J=6 Hz, 2H), 5.33-5.9(m, 1H), 7.32-7.67(m,3H), 7.79-8.0(m, 2H) ppm.

IR: νmax(CHCl₃); 3100, 1325, 1155 cm⁻¹.

3(dl)-(1α,2α,3β,5α)-6,6-Dimethyl-2-hydroxyethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexane9-b(3S*-α)

NMR: δ(CDCl₃); 0.9(s, 3H), 0.94(s, 3H), 0.6-1.3(m, 2H), 1.4-2.15(m, 5H),2.35(br.s, 1H), 3.43(br.s, 1H), 3.62(t, J=6 Hz, 2H), 5.7-6.0(d, J=7 Hz,1H), 7.4-7.7(m, 3H), 7.8-8.1(m, 2H) ppm.

IR: νmax(CHCl₃); 3500, 3370, 1325, 1165 cm⁻¹.

(26) The following compounds are prepared in accordance with the mannerof III-1, Example 1, (21).

1(dl)-(1β,2α,3α,5β)-2-Formylmethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexaneII f-a(3R*-β)

NMR: δ(CDCl₃ -CD₃ OD); -0.1-0.5(m, 2H), 0.80-2.40(m, 7H), 2.9-4.1(m,1H), 5.17-5.33(d,d, J=7.0, 3 Hz, 0.6H), 5.47-5.6(m, 0.4H), 7.3-7.57(m,3H), 7.57-7.88(m, 2H) ppm.

IR: νmax(CHCl₃); 3520, 3360, 1155 cm⁻¹.

2(dl)-(1α,2α,3β,5α)-2-Formylmethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexaneII f-a(3S*-α)

NMR: δ(CDCl₃); 0.24-0.47(m, 1H), 0.53-0.84(m, 1H), 0.87-1.90(m, 3H),1.95-2.57(m, 4H), 3.23-3.6(m, 1H), 4.85(d, J=6 Hz, 1H), 7.4-7.8(m, 3H),7.89-8.0(m, 2H), 9.68(s, 1H) ppm.

IR: νmax(CHCl₃); 3350, 1715, 1338, 1155 cm⁻¹.

3(dl)-(1β,2α,3β,5β)-6,6-Dimethyl-2-formylmethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexaneII f-b(3S*-β)

NMR: δ(CDCl₃); 0.85-1.2(m, 2H), 0.86(s, 3H), 0.96(s, 3H), 1.2-2.3(m,3H), 2.53-2.7(m, 2H), 3.05-3.4(m, 1H), 5.25-5.5(m, 1H), 7.47-7.7(m, 3H),7.8-8.0(m, 2H) ppm.

IR: νmax(CHCl₃); 3360, 2825, 2725, 1725, 1330, 1160 cm⁻¹.

4(dl)-(1α,2α,3β,5α)-6,6-Dimethyl-2-formylmethyl-3-phenylsulfonylaminobicyclo[3.1.0]hexaneII f-b(3S*-α)

NMR: δ(CDCl₃); 0.9(s, 3H), 0.99(s, 3H), 0.55-1.45(s, 3H), 1.7-2.2(m,2H), 2.4-2.9(m, 2H), 3.2-3.7(m, 1H), 5.67(br.s, 1H), 7.35-7.7(m, 3H),7.75-8.0(m, 2H), 9.65(s, 1H) ppm.

(27) 1(dl)-(1β,2α,3β,5β)-7-[3-Phenylsulfonylaminobicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid I f-ab(3S*-β) ##STR153##

A mixture of 430 mg (10.8 mmole) of 60% oily sodium hydride in 10 ml ofdimethylsulfoxide is allowed to react at 75° C. for 1.5 hours. Theresulting solution of sodium methylsulfinylmethide is kept at 12° C., towhich 2.71 g (6 mmole) of (4-carboxybutyl)triphenylphosphonium bromideis added, and the mixture is allowed to react at room temperature for 20minutes. To this mixture is added a solution of the above prepared crude(dl)-(1β,2α,3β,5β)-2-formylmethyl-3-phenylsufonylaminobicyclo[3.1.0]hexaneII f-a(3S*-β) (1.99 mmole) in 10 ml of dimethylsulfoxide and the mixtureis allowed to stand at room temperature for 2 hours. The reactionmixture is poured into a mixture of ethyl acetate and water, and theaqueous layer is acidified with 2N hydrochloric acid and extracted withethyl acetate. The ethyl acetate layer is washed with a saturated sodiumchloride aqueous solution, dried over anhydrous magnesium sulfate, andevaporated. The residue is purified by column chromatography on silicagel with a mixture of benzene-ethyl acetate (4:1) to give 634 mg of thetitled compound I f-ab(3S*-β) as a crude product in 88.6% yield.

NMR: δ(CDCl₃); -0.07-0.37(m, 2H), 1.00-2.50(m, 13H), 2.60-3.03(m, 1H),5.10(d, J=9 Hz, 1H), 5.20-5.70(m, 2H), 7.47-7.68(m, 3H), 7.83-8.05(m,2H), 8.00-9.00(br.s, 1H) ppm.

IR: νmax(CHCl₃); 3360, 3250, 1705, 1320, 1155 cm⁻¹.

2 Methyl(dl)-(1β,2α,3β,5β)-7-[3-phenylsulfonylaminobicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoateI f-aa(3S*-β)

A solution of diazomethane in ether is added to a solution of 634 mg(1.76 mmole) of(dl)-(1β,2α,3β,5β)-7-[3-phenylsulfonylaminobicyclo[3.1.0]hexane-2-yl]-(5Z)-5-heptenoicacid I f-ab(3S*-β) in 10 ml of dichloromethane under ice-cooling. Themixture is evaporated and the product is purified by columnchromatography on silica gel with a mixture of benzene and ethyl acetate(4:1) to give 548 mg of the titled compound I f-aa(3S*-β) in 73.0% yield(calcd. from the compound II f-a(3S*-β)).

NMR: δ(CDCl₃); -0.14-0.3(m, 2H), 0.93-2.36(m, 13H), 2.43-2.96(m, 1H),3.61(s, 3H), 4.46-4.73(d, J=9 Hz, 1H), 5.2-5.3(m, 2H), 7.36-7.6(m, 3H),7.73-7.93(m, 2H) ppm.

IR: νmax(CHCl₃); 3360, 1725, 1325, 1155 cm⁻¹.

[2] Sodium(dl)-(1β,2α,3β,5β)-7-[3-phenylsulfonylaminobicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoateI f-ac(3S*-β)

A solution of 290 mg (0.8 mmole) of(dl)-(1β,2α,3β,5β)-7-[3-phenylsulfonylaminobicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid I f-ab(3S*-β) in 8 ml of 0.1N sodium hydroxide aqueous solution isfreeze-dried to give 298.8 mg of the titled compound I f-ac(3S*-β)

Anal. Calcd. (%) for C₁₉ H₂₄ O₄ NSNa 1/4H₂ O: C 58.50, H 6.27, N 3.59, S8.22, Na 5.90, Found (%): C 58.60, H 6.33, N 3.77, S 8.11, Na 5.91,

Examples 2 to 5 are carried out in accordance with the manner of III-1,Example 1(27).

The results are shown in the Tables 3 to 6, respectively.

                                      TABLE 3                                     __________________________________________________________________________     ##STR154##                                                                   Compound                                                                      Number                                                                              R.sub.1                                                                           Physical Constants                                                  __________________________________________________________________________    If-aa CH.sub.3                                                                          NMR: δ (CDCl.sub.3); -0.07-0.5(m, 2H),                                                         IR: νmax(CHCl.sub.3); 3360, 1720,                                          1340,                                        (3R*-β)                                                                            0.93-1.37(m, 2H), 1.37-2.6(m, 11H), 3.60                                                             1155 cm.sup.-1.                                        (s, 3H), 3.47-3.83(m, 1H), 4.68(d, J=9 Hz,                                    1H), 5.1-5.6(m, 2H), 7.4-7.63(m, 3H),                                         7.7-8.0(m, 2H) ppm.                                                 If-ab H   NMR: δ (CDCl.sub.3); -0.11-0.52(m, 2H),                                                        IR: νmax(CHCl.sub.3); 3360, 3250,                                          1705,                                        (3R*-β)                                                                            0.92-2.82(m, 13H), 3.42-3.85(m, 11H), 4.90                                                           1320, 1155 cm.sup.-1.                                  (d, J=8 Hz, 1H), 5.07-5.62(m, 2H), 7.30-                                      7.67(m, 3H), 7.67-8.02(m, 2H) ppm.                                  If-ac Na  Anal. Calced. (%) for C.sub.19 H.sub.24 O.sub.4 NSNa,5/3H.sub.2               O                                                                   (3R*-β)                                                                            C 54.93; H 6.23; N 3.37; S 7.72;                                              Found (%): C 54.59; H 6.04; N 3.39; S 7.80.                         __________________________________________________________________________

                                      TABLE 4                                     __________________________________________________________________________     ##STR155##                                                                   Compound                                                                      Number                                                                              R.sub.1                                                                           Physical Constants                                                  __________________________________________________________________________    If-aa CH.sub.3                                                                          NMR :δ (CDCl.sub.3); 0.08-0.34(m, 1H),                                                         IR: νmax(CHCl.sub.3); 3350, 1720,                                          1350,                                        (3S*-α)                                                                           0.39-0.71(m, 1H), 0.86-1.29(m, 2H),                                                                  1155 cm.sup.-1.                                        1.45-2.39(m, 11H), 3.16-3.46(m, 1H),                                          3.63(s, 3H), 4.64(d, J=6 Hz, 1H), 5.03-                                       5.49(m, 2H), 7.43-7.66(m, 3H), 7.76-                                          7.99(m, 2H) ppm.                                                    If-ab H   NMR :δ (CDCl.sub.3); 0.08-0.33(m, 1H),                                                         IR: νmax(CHCl.sub.3); 3360, 3250,                                          1705,                                        (3S*-α)                                                                           0.36-0.73(m, 1H), 0.74-1.3(m, 2H),                                                                   1320, 1160 cm.sup.-1.                                  1.3-2.43(m, 11H), 3.13-3.53(m, 1H),                                           4.92(d, J=6 Hz, 1H), 5.06-5.50(m, 2H),                                        7.43-7.66(m, 3H), 7.76-8.01(m, 2H),                                           8.53-9.66(m, 1H) ppm.                                               If-ac Na  Anal. Calced. (%) for C.sub.19 H.sub.24 O.sub.4 NSNa,                         1/4H.sub.2 O                                                        (3S*-α)                                                                            C 58.50; H 6.27; N 3.59; S 8.22;                                             Na 5.90;                                                                      Found (%): C 58.40; H 6.32; N 3.81; S 8.21;                                   Na 6.04.                                                            __________________________________________________________________________

                                      TABLE 5                                     __________________________________________________________________________     ##STR156##                                                                   Compound                                                                      Number                                                                              R.sub.1                                                                           Physical Constants                                                  __________________________________________________________________________    If-ba CH.sub.3                                                                          NMR :δ (CDCl.sub.3); 0.85-1.15(m, 2H),                                                         IR: νmax(CHCl.sub.3); 3350, 1720,                                          1320,                                        (3S*-β)                                                                            0.88(s, 3H), 1.00(s, 3H), 1.37-2.50(m,                                                               1155 cm.sup.-1.                                        11H), 3.0-3.45(m, 1H), 4.77(d, J=9 Hz,                                        1H), 5.2-5.6(m, 2H), 7.43-7.7(m, 3H),                                         7.8-8.03(m, 2H) ppm.                                                If-bb H   NMR :δ (CDCl.sub.3); 0.73-1.10(m, 2H),                                                         IR: νmax(CHCl.sub.3); 3350, 3240,                                          1700,                                        (3S*-β)                                                                            0.87(s, 3H), 0.99(s, 3H), 1.3-2.3(m,                                                                 1315, 1150 cm.sup.-1.                                  9H), 2.35(t, J=6 Hz, 2H), 2.95- 3.4(m,                                        1H), 5.07(d, J=9 Hz, 1H), 5.2-5.55(m, 2H),                                    7.39-7.68(m, 3H), 7.77-7.97(m, 2H), 7.9-                                      8.9(m, 1H) ppm.                                                     If-bc Na  Anal. Calcd. (%) for C.sub.21 H.sub.28 O.sub.4 NSNa, H.sub.2 O      (3S*-β)                                                                            C 58.45; H 7.01; N.3.25; S 7.43;                                              Na 5.33.                                                                      Found (%): C 58.74; H 6.93; N 3.45; S 7.80;                                   Na 5.18.                                                            __________________________________________________________________________

                                      TABLE 6                                     __________________________________________________________________________     ##STR157##                                                                   Compound                                                                      Number                                                                              R.sub.1                                                                           Physical Constants                                                  __________________________________________________________________________    If-bb H   NMR :δ (CDCl.sub.3); 0.9(s, 3H), 0.92(s,                                                       IR: νmax(CHCl.sub.3); 3360, 3250,                                          1705,                                        (3S*-α)                                                                           0.6-2.25(m, 11H), 2.34(t, J=6 Hz, 2H),                                                               1320, 1160 cm.sup.-1.                                  3.47(m, 1H), 5.2-5.5(m, 1H), 5.65(d, J=9                                      Hz, 1H), 7.35-7.7(m, 3H), 7.8-8.0(m, 2H),                                     9.09(br.s, 1H) ppm.                                                 If-bc Na  Anal. Calcd. (%) for C.sub.21 H.sub.28 O.sub.4 NSNa, H.sub.2                                         IR: νmax(CHCl.sub.3); 3250, 1565,                                          1320,                                        (3S*-α)                                                                           C 58.45; H 7.01; N 3.25; S 7.43;                                                                     1160 cm.sup.-1.                                        Na 5.33;                                                                      Found (%): C 58.13; H 6.79; N 3.30; S 7.54;                                   Na 5.22.                                                            __________________________________________________________________________

III-2 EXAMPLE 6

(1) (dl)-(trans)-2-Azidocyclopent-4-enylethanol triphenylmethyl ether2(β)

To a cooled solution of 3.83 g (10.3 mmol) of(dl)-(cis)-2-hydroxycyclopent-4-enylethanol triphenylmethyl ether1b(2R*), prepared in III-1 Example 1, in 50 ml of dichloromethane withice bath, was added 0.88 ml (11.3 mmol) of methanesulfonyl chloride and1.72 ml (12.36 mmol) of triethylamine, and the mixture was reacted withice cooling for 30 min. The product was isolated by dichloromethaneextraction. The dichloromethane layer was washed with 2N aqueoushydrochloric acid, saturated aqueous sodium bicarbonate and saturatedbrine, dried with magnesium sulfate and evaporated. The sample of crude(dl)-(cis)-2-methanesulfonyloxycyclopent-4-enylethanol triphenylmethylether thus obtained, was dissolved in 50 ml of N,N-dimethylformamide and12.05 g (185.4 mmol) of sodium azide, and the mixture was reacted at 75°C. for 5 hr. After cooling, the product was isolated by ethyl acetateextraction. The ethyl acetate layer was washed with saturated brine,dried with magnesium sulfate and evaporated. The product was purified bycolumn silica gel chromatography using benzene-ethyl acetate (9:1)mixture containing 1% triethylamine as an eluent and 3.99 g (98%) of thetitled compound 2(β) was obtained.

NMR: δ(CDCl₃); 1.50-1.85(m, 2H), 2.20-3.00(m, 3H), 3.15(t, J=6 Hz),3.50-3.80(m, 1H), 5.59(s, 2H), 7.20-7.60(m, 15H) ppm.

IR: ν_(max) (CHCl₃); 2080 cm⁻¹.

(2) (dl)-(trans)-2-Aminocyclopent-4-enylethanol triphenylmethyl ether3(β)

A solution of 3.99 g (10.1 mmol) of(dl)-(trans)-2-azidocyclopent-4-enylethanol triphenylmethyl ether and3.54 g (13.5 mmol) of triphenylphosphine and 10 ml of tetrahydrofuranwas reacted at room temperature for 15 h. To this solution was added 1ml of water and the mixture was reacted at 45° C. for 2 hr and thenunder reflux for 1 hr. After cooling, the product was isolated by ethylacetate extraction. The ethyl acetate layer was washed with saturatedbrine, dried with magnesium sulfate and evaporated. The residue wasseparated by column silica gel chromatography using benzene-ethylacetate (4:1) mixture as an eluent and 4.67 g of the titled compound3(β) was obtained. The product was subjected for the next reactionwithout further purification.

NMR: δ(CDCl₃); 1.31(s, 2H), 1.57-1.82(m, 2H), 1.83-2.17(m, 1H),2.23-2.80(m, 2H), 3.00-3.27(m, 1H), 3.15(t, J=6 Hz, 2H), 5.55(s, 2H),7.03-7.56(m, 15H) ppm.

IR: ν_(max) (CHCl₃); 2080 cm⁻¹.

(3) (dl)-(trans)-2-Phenylsulfonylaminocyclopent-4-enylethanoltriphenylmethyl ether 4(β)

A 3.60 g sample of the crude (dl)-(trans)-2-aminocyclopent-4-enylethanoltriphenylmethyl ether 3(β) was dissolved in 15 ml of dichloromethane andcooled with ice-bath, and 1.52 ml (10.97 mmol) of triethylamine and 1.12ml (8.77 mmol) of benzenesulfonyl chloride were added. After reacting at0° C. for 30 min, the excess reagent was decomposed by adding dilutedaqueous ammonium hydroxide and the product was isolated bydichloromethane extraction. The dichloromethane layer was washed withsaturated brine, dried with magnesium sulfate and evaporated. Theproduct was purified by column silica gel chromatography usingbenzene-ethyl acetate (4:1) mixture as an eluent, and 2.16 g (55.2%) ofthe titled compound 4(β) was obtained.

NMR: δ(CDCl₃); 1.33-1.83(m, 2H), 1.85-2.20(m, 1H), 2.33-2.82(m, 2H),3.03(t, J=6 Hz), 3.32-3.67(m, 1H), 4.76(d, J=8 Hz, 1H), 5.49(s, 2H),7.17-7.57(m, 18H), 7.70-7.90(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3360, 1335, 1320, 1155 cm⁻¹.

(4) (dl)-(trans)-2-phenylsulfonyaminocyclopent-4-enylethanol 5a(β)

A solution of 1.37 g (2.69 mmol) of(dl)-(trans)-2-phenylsulfonylaminocyclopent-4-enylethanoltriphenylmethyl ether 4(β) in a mixture of 5 ml of 1N aqueoushydrochloric acid, 10 ml of tetrahydrofuran and 10 ml methanol wasreacted at 45° C. for 2 hrs. The solvents were evaporated and theproduct was isolated by ethyl acetate extraction. The ethyl acetatelayer was washed with saturated aqueous sodium bicarbonate and saturatedbrine, dried with magnesium sulfate and evaporated. The product waspurified by column silica gel chromatography using benzene-ethyl acetate(4:1) mixture, and 2.16 g (55.2% from 2(β) of the titled compound 5a(β)was obtained.

NMR: δ(CDCl₃ +CD₃ OD); 1.40-1.70(m, 2H), 1.90-2.23(m, 1H), 2.30-2.80(m,2H), 3.50-3.70(m, 1H), 3.60(t, J=6 Hz, 2H), 5.59(s, 2H), 7.43-7.67(m,3H), 7.8-8.0(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3650-3100, 1340, 1320, 1155 cm⁻¹.

(5) (dl)-(1α,2α,3β,5α) and(1β,2α,3β,5β)-2-Hydroxyethyl-3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexane6(3S*-α) and 6(3S*-β).

A solution of 732 mg (2.74 mmol) of(dl)-(trans)-2-phenylsulfonylaminocyclopent-4-enylethanol 5a(β) and 650mg (3.0 mmol) of 80% 3-chloroperoxybenzoic acid in 10 ml ofdichloromethane was reacted at 0° C. for 15 h. The excess reagent wasdecomposed by addition of 5% aqueous sodium thiosulfate and stirring ofthe mixture, and the product was isolated by dichloromethane extraction.The dichloromethane layer was washed with saturated aqueous sodiumbicarbonate and saturated brine, dried with magnesium sulfate andevaporated. The products were separated by column silica gelchromatography using benzene-ethyl acetate (1:1) mixture as an eluent.From the less polar fraction, 335 mg (43.4%) of(dl)-(1α,2α,3β,5α)-2-hydroxyethyl-3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexane6(3S*-α) was obtained,

NMR: δ(CDCl₃); 1.00-1.53(m, 2H), 1.62(s, 1H), 1.77-2.06(m, 2H),2.10-2.43(m, 1H), 3.30-3.80(m, 5H), 5.08(d, J=10 Hz, 1H), 7.43-7.63(m,3H), 7.72-7.95(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3100-3650, 1345, 1155 cm⁻¹.

and from the polar fraction 174 mg (22.6%) of(dl)-(1β,2α,3β,5β)-2-hydroxyethyl-3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexane6(3S*-β) was obtained.

NMR: δ(CDCl₃); 1.23-2.35(m, 5H), 2.42(broad s, 1H), 2.80-3.20(m, 1H),3.33-3.48(m, 2H), 3.69(t, J=6 Hz, 2H), 5.68(d, J=8 Hz, 1H), 7.47-7.63(m,3H), 7.80-7.95(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3400-3200, 3360, 1320, 1155 cm⁻¹.

(6)(dl)-(1α,2α,3β,5α)-2-Formylmethyl-3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexaneII g-a(3S*-α).

To a cooled solution of 0.105 ml (1.2 mmol) of oxalyl chloride in 20 mlof dichloromethane with dry ice-acetone bath at -78° C., was added 0.19ml (2.4 mmol) of dimethylsulfoxide, and the mixture was stirred at thistemperature for 5 min. To this mixture was added a solution of 271 mg(0.96 mmol) of(dl)-(1α,2α,3β,5α)-2-hydroxyethyl-3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexanein dichloromethane dropwise. After reacting the mixture at -60° C. for15 min, 1.67 ml (12 mmol) of triethylamine was added and the temperatureof the reaction mixture was allowed to rise to room temperature andreacted at room temperature for additional 1 h. The product was isolatedby ethyl acetate extraction. The ethyl acetate layer was washed withwater, 2N aqueous hydrochloric acid, saturated aqueous sodiumbicarbonate and saturated brine, dried with magnesium sulfate andevaporated. The crude titled compound II g-a(3S*-α) thus obtained wassubjected to the next reaction without further purification.

NMR: δ(CDCl₃); 1.67-2.17(m, 2H), 2.20-2.67(m, 3H), 3.30-3.63(m, 3H),4.97-5.35(m, 1H), 7.40-7.67(m, 3H), 9.62(s, 1H) ppm.

IR: ν_(max) (CHCl₃); 3360, 2820, 2720, 1725, 1345, 1160 cm⁻¹.

(7) Preparation of I g-a(3S*-α)(dl)-(1α,2α,3β,5α)-7-[3-Phenylsulfonylamino-6-oxabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid I g-ab(3S*-α) ##STR158##

A suspension of 216 mg (5.6 mmol) of 60% sodium hydride in mineral oil,in 10 ml of dimethylsulfoxide was heated at 70° C. for 2.5 hr. To thesolution of sodium methylsulfinylmethide in dimethylsulfoxide at 12° C.,was added 1.36 g (3 mmol) of (4-carboxybutyl)triphenylsulfonium bromideand the mixture was stirred at room temperature for 20 min. A solutionof 293 mg of the crude(dl)-(1α,2α,3β,5α)-2-formylmethyl-3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexanein 3 ml of dimethylsulfoxide was added to the reagent solution obtainedabove, and the mixture was reacted at room temperature for 2 h. Ethylacetate and water was added to the reaction mixture, and afteracidifying the aqueous layer by adding 2N aqueous hydrochloric acid, theproduct was isolated by ethyl acetate extraction. The ethyl acetatelayer was washed with 2N aqueous hydrochloric acid and saturated brine,dried with magnesium sulfate and evaporated. The product was purified bycolumn silica gel chromatography using benzene/ethyl acetate (2:1)mixture as an eluent and 153 mg (42.0%) of the titled compound Ig-ab(3S*-α) was obtained.

NMR: δ(CDCl₃); 1.50-2.20(m, 9H), 2.33(t, J=6 Hz, 2H), 3.27-3.63(m, 2H),4.90-5.60(m, 3H), 7.40-7.65(m, 3H), 7.78-7.97(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3360, 1705, 1345, 1160 cm⁻¹.

2(dl)-(1α,2α,3β,5α)-7-[3-Phenylsulfonylamino-6-oxabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid methyl ester I g-aa(3S*-α)

A solution of diazomethane in ether was added to a solution of 153 mg ofthe crude(dl)-(1α,2α,3β,5α)-7-[3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid in 5 ml of dichloromethane cooled with ice bath. After evaporatingthe solvents, the product was purified by column silica gelchromatography using benzene-ethyl acetate (2:1) mixture as an eluentand 153 mg (42% from 6(3S*-α)) of the titled compound I g-aa(3S*-α) wasobtained.

NMR: δ(CDCl₃); 1.50-2.16(m, 9H), 2.28(t, J=6 Hz, 2H), 3.27-3.60(m, 3H),3.66(s, 3H), 5.00-5.60(m, 3H), 7.47-7.66(m, 3H), 7.80-7.97(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3350, 1720, 1335, 1155, 1088 cm⁻¹.

3 (dl)-Sodium(1α,2α,3β,5α)-7-[3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoateI g-ac(3S*-α).

A sample of 67 mg (0.18 mmol) of(dl)-(1α,2α,3β,5α)-7-[3-benzenesulfonylamino-6-oxabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid was dissolved in 8 ml of 0.1N aqueous sodium hydroxide and thesolution was lyophilized to obtain 69 mg of the titled compound Ig-ac(3S*-α).

Anal. Calcd. (%) for C₁₈ H₂₂ O₄₅ NSNa: C, 55.80; H, 5.72; N, 3.62; S,8.28; Na, 5.93, Found (%): C, 55.63; H, 6.05; N, 3.72; S, 8.50; Na,5.72.

EXAMPLE 7

The compound 6(3S*-β), prepared in Example 6(5), is treated inaccordance with a manner of Example 6(6) and (7) to give the followingcompounds. ##STR159##

R₁ ; H I g-ab(3S*-β)

NMR: δ(CDCl₃); 1.20-2.40(m, 9H), 2.33(t, J=6 Hz, 2H), 2.77-3.18(m, 1H),3.34(s, 2H), 5.25-5.67(m, 3H), 7.40-7.63(m, 3H), 7.77-7.95(m, 2H),7.60-8.40(m, 1H) ppm.

IR: νmax (CHCl₃); 3350, 1705, 1325, 1155 cm⁻¹.

R₁ ; CH₃ I g-aa(3S*-β)

NMR: δ(CDCl₃); 1.23-2.45(m, 9H), 2.30(t, J=6 Hz, 2H), 2.80-3.23(m, 1H),3.35(s, 2H), 3.69(s, 3H), 5.10-5.65(m, 3H), 7.43-7.70(m, 3H),7.80-8.00(m, 2H), ppm.

IR: νmax (CHCl₃); 3360, 1720, 1320, 1155 cm⁻¹.

R₁ ; Na I g-aa(3S*-β)

Anal. Calcd. (%) for C₁₈ H₂₂ O₄₅ NSNa.1/2H₂ O: C, 54.50; H, 5.88; N,3.53; S, 8.09; Na, 5.80. Found (%): C, 54.84; H, 5.91; N, 3.70; S, 7.74;Na, 5.59.

EXAMPLES 8 AND 9

(1) In the same manner as above, the following compounds I g-a(3R*) areprepared from the compound I b-a(2S*) [III-1, Example 1, (5)] throughthe intermediates mentioned below. ##STR160##

NMR: δ(CDCl₃); 1.55-2.10(m, 2H), 2.27-3.40(m, 3H), 3.18(t, J=6 Hz, 2H),3.73-4.10(m, 1H), 5.40-5.80(m, 2H), 7.10-7.60(m, 15H) ppm.

IR: νmax (CHCl₃); 2080 cm⁻¹.

(2) ##STR161##

NMR: δ(CDCl₃); 1.40-2.00(m, 2H), 2.08-2.20(m, 1H), 2.40-2.85(m, 2H),3.05-3.35(m, 2H), 3.37-3.70(m, 1H), 5.40-5.80(m, 2H), 7.17-7.63(m, 15H)ppm.

(3) ##STR162##

NMR: δ(CDCl₃); 1.45-1.90(m, 2H), 1.92-2.57(m, 3H), 2.65-3.00(m, 1H),3.65(t, J=6 Hz, 2H), 3.80-4.23(m, 1H), 5.64(s, 2H), 5.97(d, J=9 Hz, 1H),7.43-7.70(m, 3H), 7.85-8.10(m, 2H) ppm.

IR: νmax (CHCl₃); 3650-3100, 3360, 1325, 1155 cm⁻¹.

(4) ##STR163##

NMR: δ(CDCl₃); 1.58-2.05(m, 5H), 2.20-2.50(m, 1H), 3.30-3.53(m, 2H),3.55-3.90(m, 1H), 3.75(s, 3H), 4.92(d, J=11 Hz, 1H), 7.40-7.63(m, 3H),7.83-7.93(m, 2H) ppm.

IR: νmax (CHCl₃); 3650-3100, 3350, 1330, 1150 cm⁻¹.

(5) ##STR164##

NMR: δ(CDCl₃); 1.55-2.45(m, 4H), 2.85-3.15(m, 1H), 3.30-3.85(m, 2H),4.23-4.50(m, 1H), 4.99(d, J=12 Hz, 1H), 5.38-5.67(m, 1H), 7.36-7.65(m,3H), 7.75-8.05(m, 2H) ppm.

IR: νmax (CHCl₃); 3600-3150, 3360, 1325, 1155 cm⁻¹.

(6) (dl)-(1α,5α)-2-Phenylsulfonyl-3-hydroxy-2-azabicyclo[3.3.0]octane7(α)

A cooled solution of 0.28 ml (3.2 mmol) of oxalyl chloride in 35 ml ofdichloromethane with dry ice-acetone bath at -78° C. was added 0.45 mlof dimethylsulfoxide and the mixture was stirred at -78° C. for 5 min.To this reagent solution was added a solution of 672 mg (2.51 mmol) of(dl)-(cis)-3-phenylsulfonylaminocyclopent-4-enylethanol 5a(α) in 5 ml ofdichloromethane and the mixture was reacted at -60° C. for 15 min.Triethylamine, 4.2 ml (30 mmol) was added to the reaction mixture andthe temperature of the mixture was allowed to rise to room temperature.After stirring the reaction mixture at room temperature for another 1 h,the product was isolated by ethyl acetate extraction. The ethyl acetatelayer was washed with water, 2N aqueous hydrochloric acid, saturatedaqueous sodium bicarbonate and saturated brine, dried with magnesiumsulfate and evaporated. The product was purified by column silica gelchromatography using benzene-ethyl acetate (2:1) mixture as an eluentand 456 mg (64.0%) of the titled compound 7(α) was obtained.

NMR: δ(CDCl₃); 1.50-2.20(m, 2H), 2.50-3.00(m, 2H), 3.15-3.65(m, 1H),4.10-4.45(m, 2H), 5.10-6.40(m, 3H), 7.35-7.70(m, 3H), 7.75 8.05(m, 2H)ppm.

IR: ν_(max) (CHCl₃); 3550, 3200-3450, 1345, 1155 cm⁻¹.

(7)(dl)-(1α,5α)-2-Phenylsulfonyl-3-hydroxy-6α,7α-epoxy-2-azabicyclo[3.3.0]octaneII g-a(3R*-α)

A mixture of 265 mg (1.0 mmol) of(dl)-(1α,5α)-2-phenylsulfonyl-3-hydroxy-2-azabicyclo[3.3.0]octane 7(α)and 258 mg (1.2 mmol) of 80% 4-chloroperoxybenzoic acid in 10 ml ofdichloromethane was stirred at room temperature for 5 h. The product wasisolated by dichloromethane extraction. The dichloromethane layer waswashed with saturated aqueous sodium thiosulfate, 2N aqueous sodiumcarbonate and saturated brine, dried with magnesium sulfate andevaporated. The product was purified by column silica gel chromatographyusing benzene-ethyl acetate (2:1) mixture as an eluent and 76 mg (27%)of the title compound II g-a(3R*-α) was obtained.

NMR: δ(CDCl₃); 1.5-3.0(m, 3H), 3.2-3.65(m, 2H), 3.65-4.0(m, 1H),4.5-4.9(m, 1H), 5.4-5.75(m, 1H), 7.3-7.65(m, 3H), 7.75-8.2(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3580, 3360, 1350, 1160 cm⁻¹.

(8) Methyl(dl)-(1α,2α,3α,5α)-7-[3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoateI g-aa(3R*-α) ##STR165##

NMR: δ(CDCl₃); 1.5-1.9(m, 4H), 1.9-2.5(m, 7H), 3.33(s, 2H), 3.45-3.8(m,1H), 3.67(s, 3H), 4.82(d, J=9 Hz, 1H), 5.30-5.56(m, 2H), 7.35-7.65(m,3H), 7.75-8.0(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3375, 1728, 1150, 1095 cm⁻¹.

(9) ##STR166##

R₁ : H I g-ab(3R*-β)

NMR: δ(CDCl₃); 1.50-1.90(m, 4H), 1.93-2.50(m, 7H), 3.41(s, 2H),3.55-3.90(m, 1H), 4.94(d, J=11 Hz, 1H), 5.35-5.57(m, 2H), 7.40-7.63(m,3H), 7.73-7.97(m, 2H), 8.80-9.60(m, 1H) ppm.

IR: νmax (CHCl₃); 3350, 1700, 1340, 1155 cm⁻¹.

R₁ ; CH₃ I g-aa(3R*-β)

NMR: δ(CDCl₃); 1.50-1.87(m, 4H), 1.92-2.45(m, 7H), 3.39(s, 2H),3.50-3.87(m, 1H), 3.66(s, 3H), 4.70-4.98(m, 1H), 5.33-5.52(m, 23H),7.40-7.60(m, 3H), 7.75-7.93(m, 2H) ppm.

IR: νmax (CHCl₃); 3350, 1720, 1335, 1155 cm⁻¹.

R₁ ; Na I g-ac(3R*-β)

Anal. Calcd, (%) for C₁₈ H₂₂ O₄₅ NSNa.1/2H₂ O: C, 54.50; H, 5.88; N,3.53; S, 8.09; Na, 5.80. Found (%): C, 54.29; H, 5.87; N, 3.60; S, 8.23;Na, 5.43.

EXAMPLE 10(dl)-(1β,2α,3β,5β)-7-[Phenylsulfonylamino-6-thiabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid methyl ester I g-ba(3S*-β). ##STR167##

A two layer mixture of 4.5 g (0.6 mmol) of potassium thiocyanate in 5 mlof water, 6.75 g of phosphoric acid and 15 ml of ether was stirredvigorously and the ether layer was separated. The thiocyanic acidsolution in ether thus obtained was cooled with ice bath and a solutionof 568.5 mg (1.5 mmol) of(dl)-(1α,2α,3β,5α)-7-[3-phenylsulfonylamino-6-oxabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid methyl ester I g-aa(3S*-β) was added. After the temperature of thereaction mixture was allowed to rise to room temperature, the mixturewas stirred for another 2 h, and the product was isolated by etherextraction. The ether layer was washed with 2N aqueous sodium carbonateand saturated brine, dried with magnesium sulfate and evaporated toobtain the product mixture containing (dl)-[1β(or 2β)-hydroxy-2α(or-1α)thiocyano-4β-phenylsulfonylaminocyclohexan-3α-yl]-(5Z)-5-heptenoicacid methyl ester. This product was dissolved in 10 ml ofdichloromethane and cooled with ice bath and 0.128 ml (1.65 mmol) ofmethanesulfonyl chloride and 0.314 ml (82.25 mmol) of triethylamine wasadded to the solution and the mixture was reacted at 0° C. for 30 min.The product was isolated by dichloromethane extraction. Thedichloromethane layer was washed with 2N aqueous hydrochloric acid,saturated aqueous sodium bicarbonate and saturated brine, dried withmagnesium sulfate and evaporated to obtain the product mixturecontaining (dl)-7-[1β(or 2β)-methanesulfonyloxy-2α(or-1α)-thiocyano-4β-phenylsulfonylaminocyclohexan-3α-yl]-(5Z)-5-heptenoicacid methyl ester. This product mixture was dissolved in 25 ml ofdioxane and 5% potassium hydroxide solution in methanol, and the mixturewas stirred at room temperature for 12 hr. After evaporating thesolvents, ethyl acetate and water was added to the residue and theaqueous layer was acidified with 2N aqueous hydrochloric acid. Theproduct was isolate by ethyl acetate extraction. The ethyl acetate layerwas washed with 2N aqueous hydrochloric acid and saturated brine, driedwith magnesium sulfate and evaporated. Crystallization of the residuefrom ether-n-hexane gave 444 mg of the crude(dl)-(1β,2α,3β,5β)-7-[3-phenylsulfonylamino-6-thiabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid I g-bb(3S*-β).

NMR: δ(CDCl₃); 2.50-1.30(m, 11H), 2.90-3.40(m, 3H), 5.20-5.70(m, 3H),7.37-7.70(m, 3H), 7.60-8.30(m, 1H), 7.76-8.00(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3360, 3350-3100, 1700, 1320, 1155, 1085 cm⁻¹.

A 370 mg portion of the crude product of the compound I g-bb(3S*-β) wasdissolved in dichloromethane and a solution of diazomethane in ether wasadded with cooling by ice bath. The solvents were evaporated and theproduct was purified by column silica gel chromatography usingbenzene-ethyl acetate (2:1) mixture as an eluent to obtain 349 mg (88.3%from I g-aa(3S*-β) of the titled compound I g-ba(3S*-β).

NMR: δ(CDCl₃); 1.50-2.50(m, 11H), 3.07-3.46(m, 3H), 3.70(s, 3H), 5.06(d,J=10 Hz, 1H), 5.36-5.57(m, 2H), 7.43-7.70(m, 3H), 7.80-7.97(m, 2H) ppm.

IR: ν_(max) (CHCl₃); 3360, 1720, 1325, 1155, 1088 cm⁻¹.

EXAMPLE 11 ##STR168##

R₁ ; H I g-bb(3R*-α)

NMR: δ(CDCl₃); 1.5-1.9(m, 4H), 1.9-2.6(m, 7H), 3.15(m, 2H), 3.63-4.05(m,1H), 5.25(d, J=10 Hz), 5.25-5.60(m, 1H), 7.4-7.7(m, 3H), 7.8-8.0(m, 3H)ppm.

IR: νmax (CHCl₃); 3370, 3100-3350, 1700, 1155, 1083 cm⁻¹.

R₁ ; CH₃ I g-ba(3R*-60 )

NMR: δ(CDCl₃); 1.50-2.50(m, 11H), 3.14(m, 2H), 3.66(s, 3H), 3.73-4.10(m,1H), 5.14(d, J=10 Hz), 5.25-5.65(m, 2H), 7.35-7.63(m, 3H), 7.77-7.97(m,2H) ppm.

IR: νmax (CHCl₃); 3370, 1720, 1155, 1088 cm⁻¹.

EXAMPLE 12(dl)-(1α,2α,3β,5α)-7-[3-Phenylsulfonylamino-6-thiabicyclo[3.1.0]hexan-2-yl]-(5Z)-5-heptenoicacid methyl ester

I g-ba(3S*-α) ##STR169##

NMR: δ(CDCl₃); 1.50-2.60(m, 11H), 3.07-3.22(m, 1H), 3.23-3.40(m, 1H),3.45-3.77(m, 1H), 3.67(s,3H), 5.00-5.60(m, 3H), 7.43-7.65(m, 3H),7.77-7.93(m, 2H) ppm.

IR: νmax (CHCl₃); 3300, 1723, 1155, 1088 cm⁻¹.

IV-1 EXAMPLE 1-1

(1) Methyl5(Z)-7-[(1S,2S,3S,5R)-3-benzenesulfonamido-6,6-dimethyl-bicyclo[3.1.1]hept-2-yl]-5-heptenoateI h-aa(2S-t-5Z) ##STR170##

To a solution of 107 mg of methyl5(Z)-7-[(1S,2S,3S,5R)-3-amino-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoateII h-a(2S-t-5Z) [Japan Unexamin. Pat. Pub. No. 13551/1983] in 10 ml ofdichloromethane is added 1 ml of triethylamine and then 126 mg ofbenzenesulfonyl chloride added, and the mixture is stirred at roomtemperature for 1 hour. The reaction mixture is successively washed with5 ml of 10% hydrochloric acid, 10 ml of 5% sodium carbonate aqueoussolution and 10 ml of a saturated sodium chloride aqueous solution,dried over anhydrous sodium sulfate, and evaporated under reducedpressure. The residue is purified by chromatography on a silica gelcolumn and eluted with n-hexane-ethyl acetate (10:1→4:1) to give 85 mgof the titled compound I h-aa(2S-t-5Z), of which the physical constantsare as follows.

[α]_(D) 10.5°(21° C., c=1.609, Methanol)

CD(CH₃ OH): λnm(Δε) 268.5(0.061), 260(0.115), 225(4.48).

¹ H-NMR(CDCl₃): δ ppm 0.78(1H, d, J=9 Hz), 0.93(3H, s), 1.15(3H, s),1.43˜2.50(14H), 3.57(1H, m), 3.67(3H, s), 4.82(1H, d, J=8 Hz), 5.26(2H,m), 7.36˜7.63(3H, m), 7.86-7.97(2H, m).

IR(Film): νmax 3280, 1737, 1330, 1159 cm⁻¹.

MS: m/z 419(M⁺).

(2)5(Z)-7-[(1S,2S,3S,5R)-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoicacid I h-ba(2S-t-5Z) and its salts I h-ca(2S-t-5Z) and I h-da(2S-t-5Z)##STR171##

1 Carboxylic acid I h-ba(2S-t-5Z)

To a solution of 120 mg of the methyl ester I h-aa(2S-t-5Z) (prepared inExample 7) in 15 ml of methanol is added 7 ml of 5% potassium hydroxideaqueous solution and the mixture is stirred at room temperature for 20hours. The reaction mixture is acidified with 10% hydrochloric acid andextracted with 25 ml of ethyl acetate twice. The extract is washed with5 ml of saturated sodium chloride aqueous solution twice, dried overanhydrous sodium sulfate, and evaporated under reduced pressure. Theresidue is purified by chromatography on silica gel and eluted withmixed solvent of n-hexane-ethyl acetate (2:1) to give 109 mg of thetitled carboxylic acid I h-ba(2S-t-5Z), of which the physical constantsare as follows.

¹ H-NMR(CDCl₃): δ ppm 0.79(1H, d, J=10 Hz), 0.92(3H, s), 1.14(3H, s),1.40˜2.53(14H), 3.60(1H, m), 5.10˜5.50(3H), 7.37˜7.70(3H, m),7.89˜8.00(2H, m), 8.86(1H, br.s).

IR(Film): νmax 3270, 1709, 1325, 1156 cm⁻¹.

MS: m/z 406(MH).

2 Sodium salt I h-ca(2S-t-5Z)

To a solution of 90 mg of the resulting carboxylic acid I h-ba(2S-t-5Z)in 6 ml of methanol is added 1 ml of 0.21M solution of sodium methoxidein methanol and the mixture is evaporated under reduced pressure. Theresulting residue is dissolved in 5 ml of water, to which and activecarbon is added, and then the mixture is filtered. The resulting aqueoussolution is freezed-dried to give 86 mg of the sodium salt Ih-ca(2S-t-5Z), of which the physical constants are as follows.

IR(KBr): νmax 3420, 3275, 1565, 1324, 1157 cm⁻¹.

Anal. Calced. (%) for C₂₂ H₃₀ NO₄ SNa: C 61.81; H 7.07; N, 3.28; S,7.50; Found (%): C 61.52; H 7.04; N, 3.31; S, 7.43.

3 Dicyclohexylammonium salt I h-da(2S-t-5Z)

To a solution of 6.83 g of the carboxylic acid I h-ba(2S-t-5Z) in 180 mlof ether is dropwise added a solution of 3.06 g of dicyclohexylamine in20 ml of ether. The resulting colorless crystals are collected byfiltration to give 9.8 g of the salt I h-da(2S-t-5Z), of which thephysical constants are as follows. mp. 129°-131-° C.

¹ H-NMR(CDCl₃): δ ppm 0.83(1H, d, J=6 Hz), 0.90(3H, s), 1.13(3H, s),1.00˜2.60(34H), 2.92(2H, m), 3.47(1H, m), 5.10˜5.50(2H), 7.18(1H, br.s),7.35˜7.66(3H), 7.85˜8.11(2H), 8.71(2H, br.s).

IR(KBr): νmax 3435, 1618, 1555, 1324, 1165, 1155 cm⁻¹.

Anal. Caled. (%) for C₃₄ H₅₄ N₂ O₄ S: C 69.58; H 9.27; N, 4.77; S, 5.46;Found (%): C 69.40; H 9.34; N, 4.66; S, 5.53.

EXAMPLE 1-2

(1)5(Z)-7-[(1S,2S,3S,5R)-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoicacid I h-ba(2S-t-5Z) and its sodium salt I h-ca(2S-t-5Z) and5(E)-7-[(1S,2S,3S,5R)-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoicacid I h-ba(2S-t-5E) and its sodium salt I h-ca(2S-t-5E) ##STR172##

The starting compound,(1S,2S,3S,5R)-2-formylmethyl-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]heptaneIII h-a(2S-t) can be prepared from(1S,2S,3S,5R)-2-[2-(tetrahydropyran-2-yloxy)ethyl]-3-amino-6,6-dimethylbicyclo[3.1.1]heptane[The compound described in Jap. Unexamined Pat. Pub. 13551/1983] as astarting material by the following method. The starting amine which isthe starting compound of this reaction is first sulfonylated withbenzenesulfonyl chloride in the same manner as in IV-1, Example 1-1, (1)to give the sulfonamide derivatives. Romoval of 2-tetrahydropyranylgives the hydroxy compound, which is further oxidized with an oxidizingagent such as dimethyl sulfoxide-oxalyl chloride to give the aldehydeIII h-a(2S-t) as the starting compound. The titled compound I h-ba(2S-t)is prepared from the above-mentioned aldehyde III h-a(2S-t) as follows.

In 250 ml of tetrahydrofuran is suspended 36 g of4-carboxybutyltriphenylphosphonium bromide in a stream of nitrogen and22 g of potassium tert-butoxide is added thereto at room temperature.The mixture is stirred for 1 hour, to which a solution of 9.76 g of theabove-mentioned aldehyde III h-a(2S-t) in 130 ml of tetrahydrofuran isdropwise added at room temperature, and then the resulting mixture isstirred for 1 hour. 300 ml of water is added and the reaction mixture iswashed with 200 ml of ether. The aqueous layer is acidified with 10%hydrochloric acid and extracted with ether. The extract is washed with asaturated sodium chloride aqueous solution, dried over sodium salfate,and evaporated under reduced pressure. The obtained residue is purifiedby chromatography on a silica gel column and eluted with ethylacetate-n-hexane (1:2) to give 8.46 g of the 5Z-olefin I h-ba(2S-t-5Z)as polar fraction and 1.91 g of the titled 5E-olefin I h-ba(2S-t- 5E),of which the physical constants are as follows.

[α]_(D) 5.0°(26° C., c=1.562, Methanol).

[α]₃₆₅ 43.7°(26° C., c=1.562, Methanol).

IR (Film): νmax 3275, 1709, 1328, 1155, 970 cm⁻¹.

NMR (CDCl₃): δ ppm 0.81(1H, d, J=10 Hz), 0.88(3H, s), 1.13(3H, s),1.41˜2.53(14H), 3.55(1H, m), 5.02˜5.44(3H), 7.35˜7.70(3H),7.86˜7.96(2H), 9.20(1H, br.s).

In the same manner as in Example 3, 600 mg of the above-mentionedcarboxylic acid I h-ba(2S-t-5E) is treated to give 600 mg of the sodiumsalt I h-ca(2S-t-5E), of which the physical constant is as follows.

IR (KBr): νmax 3420, 3280, 1562, 1326, 1153, 968 cm⁻¹.

IV-2 EXAMPLE 2

(1) 1(1S,2S,3S,5R)-2-[2-(Tetrahydropyran-2-yloxy)-ethyl]-3-methanesulfonyloxy)-6,6-dimethylbicyclo[3.1.1]heptane14a ##STR173##

To a solution of 13 g of(1S,2S,3S,5R)-3-hydroxy-6,6-dimethyl-2-[2-(tetrahydropyran-2-yloxy)-ethyl]bicyclo[3.1.1]heptane14 [Jap. Unexamined Pat. Pub. No. 13551/1983] in 130 ml ofdichloromethane is added 9.9 ml of triethylamine in a stream of nitrogenand then 6.16 g of methanesulfonyl chloride is dropwise added at -20°C., and the resulting mixture is stirred at the same temperature for 15minutes. The reaction mixture is diluted with ether, washed with water,a saturated aqueous solution; of ammonium chloride and a saturatedsodium chloride aqueous solution successively, dried over sodiumsulfate, and evaporated under reduced pressure to give 16 g of thetitled compound 14a, of which the physical constant is as follows.

¹ H-NMR (CDCl₃): δ ppm 0.92(3H, s), 1.12(1H, d, J=10 Hz), 1.22(3H, s),1.36˜2.86(14H), 3.03(3H, s), 3.30˜3.63(2H, m), 3.67˜3.83(2H, m),4.57(1H, m), 5.06(1H, m).

2(1S,2S,3R,5R)-2-[2-(Tetrahydropyran-2-yloxy)ethyl]-3-azido-6,6-dimethylbicyclo[3.1.1]heptane15 ##STR174##

To a solution of 16 g of the above-mentioned methanesulfonyl compound14a in 60 ml of hexamethylphosphoramide is added 4.73 g of sodium azidein stream of nitrogen and the mixture is stirred at 50° C. for 2 hours.200 ml of ether is added and the reaction mixture is washed with waterand a saturated sodium chloride aqueous solution, dried over sodiumsulfate, and evaporated under reduced pressure. The residue is purifiedby chromatography on a silica gel column and eluted with n-hexane-ethylacetate (20:1) to give 8.64 g of the titled compound 15, of which thephysical constant is as follows.

¹ H-NMR (CDCl₃): δ ppm 0.96(3H, s), 1.12(1H, d, J=10 Hz), 1.16 (3H, s),1.36˜2.68(11H), 3.21˜3.97(4H), 4.22(1H, td, J=10, 6 Hz), 4.54(1H, m).

3(1S,2S,3R,5R)-2-[2-(Tetrahydropyran-2-yloxy)-ethyl]-3-amino-6,6-dimethylbicyclo[3.1.1]heptane16 ##STR175##

To a solution of 8.64 g of the above-mentioned azide compound 15 in 300ml of ether is portionwise added 1.2 g of lithium aluminium hydride andthe mixture is refluxed under heating for 1 hour. To the reactionmixture is added 10 g of ice and then added 300 ml of 10% aqueoussolution of sodium hydroxide. The resulting mixture is shaken well andthen the ether layer is collected. The aqueous layer is extracted withether again. The combined ether layers are washed with water, dried oversodium sulfate, and evaporated under reduced pressure to give 7.56 g ofthe titled compound 16, of which the physical constant is as follows.

¹ H-NMR (CDCl₃): δ ppm 0.93(3H, s), 1.16(3H, s), 1.28(1H, d, J=9 Hz),1.30˜2.47(16H), 3.16˜3.97(5H), 4.56(1H, m).

(2) 1(+)-(1S,2S,3R,5R)-2-[2-(Tetrahydropyran-2-yloxy)ethyl]-3-(trifluoroacetylamino)-6,6-dimethylbicyclo[3.1.1]heptane17a ##STR176##

In an atmosphere of nitrogen, 23 ml of pyridine is added to a solutionof 7.56 g of the above-mentioned amino compound 16 in 200 ml ofdichloromethane at 0° C. and then 7.44 g of trifluoroacetic anhydride isdropwise added slowly. The mixture is stirred for 15 minutes. Ether isadded and the resulting mixture is washed with water and a saturatedsodium chloride aqueous solution, dried over sodium sulfate, andevaporated under reduced pressure. The residue is purified bychromatography on a silica gel column and eluted with n-hexane-ethylacetate (9:1) to give 9.9 g of the titled compound 17a of which thephysical constants are as follows.

[α]_(D) +63.8°(25° C., c=2.241, Methanol).

¹ H-NMR (CDCl₃): δ ppm 0.97(3H, s), 1.21(3H, s), 1.38(1H, d, J=9 Hz),1.40˜2.78(14H), 3.13˜4.00(4H), 4.45˜4.93(2H), 6.62(1H, br.s).

IR (Film): νmax 3310, 1697, 1554 cm⁻¹.

MS: m/z 364(MH).

Anal. Calcd. (%) for C₁₈ H₂₈ NO₃ F₃ : C, 59.49; H, 7.77; N, 3.85; F,15.68; Found (%): C, 59.30; H, 7.84; N, 3.60; F, 15.59.

2(+)-(1S,2S,3R,5R)-2-(2-Hydroxy)ethyl-3-(trifluoroacetylamino-6,6-dimethylbicyclo[3.1.1]heptane18a ##STR177##

To a solution of 9.7 g of the above-mentioned tetrahydropyran-2-yloxycompound 17a in 270 ml of methanol is added 115 mg of p-toluenesulfonicacid and the mixture is stirred at room temperature for 2 hours, andthen 0.5 ml of triethylamine is added thereto. The resulting mixture isevaporated under reduced pressure, the residue is dissolved inchloroform, washed with water and a saturated sodium chloride aqueoussolution, dried over sodium sulfate, and evaporated under reducedpressure. The residue is crystallized from chloroform-hexane to give6.62 g of the titled compound 18a as needles, of which the physicalconstants are as follows. Mp. 143°-144° C.

[α]_(D) +69.3°(25° C., c=2.639, Methanol)

¹ H-NMR (CDCl₃): δ ppm 1.95(3H, s), 2.21(3H, s), 1.38(1H, d, J=10 Hz),1.50˜2.85(9H), 3.61(2H, m), 4.67(1H, m), 6.25(1H, br.s)

IR (KBr): νmax 3450, 3220, 3080, 1695, 1566 cm⁻¹.

MS m/z: 280(MH).

Anal. Calcd. (%) for C₁₃ H₂₀ NO₂ F₃ : C, 55.90; H, 7.22; N, 5.02; F,20.41; Found (%): C, 56.22; H, 7.29; N, 4.99; F, 20.34.

(3)(-)-(2RS,3aS,4S,6R,7aR)-2-Hydroxy-5,5-dimethyl-1-trifluoroacetyl-4,6-methano-octahydroindole19a ##STR178##

In an atmosphere of nitrogen, 3.4 ml of dimethylsulfoxide in 5 ml ofdichloromethane is dropwise slowly added to a solution of 2 ml of oxalylchloride in 25 ml of dichloromethane at -50° C. and the mixture isstirred at the same temperature for 2 minutes. To the above mixture isadded 2.79 g of the above-mentioned alcohol 18a in a mixture of 20 ml ofdichloromethane and 2 ml of dimethylsulfoxide at -50° C. and theresulting mixture is stirred at -15° C. for 20 minutes, then cooled to-50° C. again, and 10 ml of triethylamine is added thereto. Afterstirred for 5 minutes, the mixture is warmed up to room temperature,then added 50 ml of water thereto. This is extracted with a mixture ofether and ethyl acetate (1:1) and the extract is washed with water,dried over sodium sulfate, and evaporated under reduced pressure. Theextract is washed with water, dried over sodium sulfate, evaporatedunder reduced pressure. The residue is purified by chromatography on asilica gel column and eluted with dichloromethane-hexane (10:1→5:1). Theeluate is recrystallized from dichloromethane and hexane to give 1.9 gof the titled compound 19a, of which the physical constants are asfollows.

Mp. 90°-91° C.

[α]_(D) 63.8°(25° C., c=1.208, Methanol) (with mutarotation; the dataone hour after the dissolution)

¹ H-NMR (CDCl₃): δ ppm 0.89(3H, s), 1.15(1H, d, J=10 Hz), 1.21(3H, s),1.60˜3.60(9H), 4.23˜4.80(1H, m), 5.75˜6.10(1H, m).

IR (KBr): νmax 3520, 1672 cm⁻¹.

MS: m/z 277(M⁺)

Anal. Calcd. (%) for C₁₃ H₁₈ NO₂ F₃ : C, 56.31; H, 6.54; N, 5.05; F,20.55; Found (%): C, 56.25; H, 6.53; N, 5.14; F, 20.73.

(4) 1(+)-7-[(1S,2S,3R,5S)-3-(Trifluoroacetylamino)-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoicacid II h-b(2S-c) ##STR179##

PROCEDURE A

To a suspension of 6.785 g of 4-carboxylbutyltriphenylphosphoniumbromide in 60 ml of tetrahydrofuran is added 4.117 g of potassiumtert-butoxide at room temperature and the mixture is stirred for 30minutes, and then 1.697 g of the above aldehyde equivalent 19a in 50 mlof tetrahydrofuran is dropwise added thereto at room temperature. Theresulting mixture is stirred at the same temperature for 1 hour, towhich then 100 ml of water is added, and washed with ether. The etherlayer is extracted with 10% aqueous solution of sodium carbonate and thecombined aqueous layers are acidified with 10% hydrochloric acid andextracted with ether. The organic layer is washed with water, dried oversodium sulfate, and evaporated under reduced pressure. The residue ispurified by chromatography on a silica gel column using n-hexane-ethylacetate (4:1→2:1) as eluent to give 2.045 g of the titled compound IIh-b(2S-c) as a mixture of the Z-isomer and the E-isomer. The physicalconstants are as follows.

[α]_(D) -92.0°(25° C., c=1.876, Methanol)

NMR (CDCl₃): δ ppm 0.97(3H, s), 1.20(3H, s), 1.32(1H, d, J=10 Hz),1.47˜2.80(14H), 4.72(1H, m), 5.33(2H, m), 6.38(1H, br.d, J=9 Hz),9.67(1H, br.s).

IR (Film): νmax 3300, 3100, 1705, 1558 cm⁻¹.

MS: m/z 361(M⁺).

PROCEDURE B

A suspension of 2.4 g of sodium hydride (content 50%) in 50 ml ofdimethylsulfoxide is stirred at 70° C. for 1.5 hours and then a solutionof 11.08 g of 4-carboxybutyltriphenylphosphonium bromide in 25 ml ofmethylsulfoxide is dropwise added thereto at room temperature. Themixture is stirred at the same temperature for 15 minutes, to which asolution of 1.664 g of the aldehyde equivalent 19a in 20 ml ofdimethylsulfoxide is dropwise added, and then the resulting mixture isstirred at room temperature for 1 hour. 10 g of ice is added and further100 ml of water added, and the mixture is washed with ether. The aqueouslayer is acidified with 10% hydrochloric acid and extracted with 50 mlether twice. The extract is washed with a saturated sodium chlorideaqueous solution, dried over sodium sulfate, and evaporated underreduced pressure. The residue is purified by chromatography on a silicagel column using n-hexane-ethyl acetate (4:1) as an eluent to give 2.107g of the titled compound, the Z-isomer II h-b(2S-c-5Z), of which thephysical constants are as follows.

[α]_(D) +94.0°(25° C., c=0.957, Methanol).

¹ H-NMR (CDCl₃): δ ppm 0.97(3H, s), 1.20(3H, s), 1.32(1H, d, J=10 Hz),1.46˜2.75(14H), 4.70(1H, m), 5.30(2H, m), 6.31(1H, br.d, J=7 Hz),7.20(1H, br.s).

IR (Film): νmax 3300, 3100, 1705, 1558 cm⁻¹.

2 Methyl(+)-7-[(1S,2S,3R,5R)-3-amino-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoateII h-a(2S-c) ##STR180##

To 1.995 g of the carboxylic acid prepared in the procedure A is added10% aqueous solution of potassium hydroxide and the mixture is heatedunder refluxing for 2 hours. The reaction mixture is cooled to roomtemperature, neutralized with acetic acid, and evaporated under reducedpressure. The residue is dissolved in 40 ml of methanol, then theinsoluble material is removed by filtration, and the filtrate isevaporated under reduced pressure again. The residue is dissolved in 40ml of methanol again and the insoluble material is removed byfiltration. An excess of diazomethane/ether solution is added to thefiltrate at 0° C. The reaction mixture is evaporated under reducedpressure and the resulting residue is purified by chromatography on asilica gel column using chloroform/methanol (10:1) as an eluent to give1.06 g of the titled compound II h-a(2S-c) as a mixture of the Z-isomerand E-isomer, of which the physcal constant is as follows.

¹ H-NMR (CDCl₃): δ ppm 0.96(3/2H, s), 1.0(3/2H, s), 1.15(3H, s),1.23(1H, d, J=10 Hz), 1.40˜2.62(16H), 3.66(3H, s), 3.40˜3.90(1H, m),5.38(2H, m).

The compound II h-b(2S-c-5Z) is treated in the same manner as to givethe titled compound of the Z-form II h-a(2S-c-5Z).

¹ H-NMR (CDCl₃): δ ppm 0.99(3H, s), 1.16(3H, s), 1.22(1H, d, J=10 Hz),1.40˜2.65(16H), 3.5˜3.9(1H), 3.66(3H, s), 5.36(2H, m).

(5) 1 Methyl(+)-7-[(1S,2S,3R,5R)-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoateI h-aa(2S-c) ##STR181##

In the same manner as in Example 7, 1.06 g of the amino compound IIh-a(2S-c) is treated to give 1.36 g of the titled compound I h-aa(2S-c)as a mixture of the Z-isomer and E-isomer, of the which the physicalconstants are as follows.

[α]_(D) -52.0° (25° C., c=2.521, Methanol)

¹ H-NMR (CDCl₃): δ ppm 0.90(3/2H, s), 0.92(3/2H, s), 1.12(3H, s),1.15(1H, d, J=10 Hz), 1.45˜2.53(14H), 3.67(3H, s), 4.05(1H, m), 4.80(1H,m), 5.27(2H, m), 7.40˜7.70(3H, m), 7.87˜7.97(2H, m).

IR (Film): νmax 3285, 1737, 1322 cm⁻¹.

MS: m/z 419(M⁺)

CD(Methanol): λnm(Δε) 269(+0.300), 262(+0.390), 257(+0.358), 221(+4.63).

Anal. Calcd. (%) for C₂₃ H₃₃ NO₄ S: C, 65.84; H, 7.93; N, 3.34; S, 7.64;Found (%): C, 65.42; H, 7.91; N, 3.36; S, 7.52.

The compound II h-a(2S-c-5Z) is treated in the same manner to give thetitled compound of the Z-form I h-aa(2S-c-5Z).

[α]_(D) +48.2° (25° C., c=1.826, Methanol)

NMR (CDCl₃): δ ppm 0.93(3H, s), 1.13(3H, s), 1.15(1H, d, J=10 Hz),1.43˜2.53(14H), 3.66(3H, s), 4.02(1H, m), 4.92(1H, d, J=9 Hz), 5.26(2H,m), 7.37˜7.68(3H), 7.85˜7.96,(2H).

2 (+)-7-[(1S,2S,3R,5R)-3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoic acid I h-ba(2S-c) and its sodium salt Ih-ca(2S-c) ##STR182##

In the same manner as in IV-1, Example 1-1 (2), 1.237 g, of the methylester I h-aa(2S-c) is treated to give the titled carboxylic acid Ih-ba(2S-c) as a mixture of the Z-isomer and E-isomer, of which thephysical constants are as follows.

[α]_(D) +51.0° (25° C., c=2.524, Methanol).

¹ H-NMR (CDCl₃): δ ppm 0.92(3H, s), 1.12(3H, s), 1.15(3H, d, J=10 Hz),1.45˜2.57(14H), 4.02(1H, m), 5.00˜5.40(3H, m), 7.34˜7.96(3H, m),7.84˜7.95(2H, m), 8.36(1H, br,s).

IR (Film): νmax 3285, 1708, 1320, 1160 cm⁻¹.

The compound I h-aa(2S-c-5Z) is treated in the same manner to give thetitled compound of the Z-form I h-ba(2S-c-5Z).

[α]_(D) +46.0° (25° C., c=1.620, Methanol).

¹ H-NMR (CDCl₃): δ ppm 0.92(3H, s), 1.11(3H, s), 3.13(1H, d, J=10 Hz),1.43˜2.53(14H), 4.03(1H, m), 5.06˜5.48(3H, m), 7.35˜7.67(3H),7.84˜7.96(2H, m), 8.50(1H, br.s).

MS: m/z 405(M⁺).

IR (Film): νmax 3285, 1708, 1320, 1160 cm⁻¹.

The above carboxylic acid I h-ba(2S-c) or I h-ba(2S-c-5Z) is treated inthe manner of IV-1, Example 1-1 (2), to give the sodium salt Ih-ca(2S-c) or the sodium salt I h-ca(2S-c-5Z), of which the physicalconstants are as follows, respectively.

IR (KBr): νmax 3420, 3280, 1560, 1320, 1160 cm⁻¹.

Anal. Calcd. (%) for C₂₂ H₃₀ NO₄ SNa: C, 61.81; H, 7.07; N, 3.28; S,7.50; Found (%): C, 61.17; H, 6.89; N, 3.33; S, 7.49.

IV-3 EXAMPLE 3 ##STR183##(1S,2R,3S,5R)-3-Hydroxy-6,6-dimethyl-2-[2-tetrahydropyran-2-yloxy)-ethyl]-bicyclo[3.1.1]heptane1(2R-c)

(1S,2R,5R)-6,6-Dimethyl-3-keto-2-[2-(tetrahydropyran-2-yloxy)ethyl]-bicyclo[3.1.1]heptane [Japan Unexamin. Pat Pub. No 13551/1983](15.4 g) was dissolved in a solution of sodium methoxide (1.11M, 160 ml)at room temperature. The solution was stirred at room temperature for 2h. The nmr spectrum showed to be a (ca 11:1) mixture of the epimerizedketone 1'(2R) and 1'(2S). The reduction of the mixture was carried outwith sodium borohydride according to the method used to the reduction ofthe ketone 1. The residue was chromatographed on silica gel inhexane-ethyl acetate (10:1), 90.3% Yield. nmr δ ppm(CDCl₃) 0.92(3H,s),1.19(3H,s), 1.25(1H,d,J=10 Hz), 1.35-2.53(14H), 3.35-4.15(6H),4.63(1H,m).

In the same manner as mentioned in IV-2 Example 2, the followingcompound Ih(2R-c) is prepared through the intermediates mentioned below.

(1S,2R,3R,5R)-2-[2-(Tetrahydropyran-2-yl-oxy)ethyl]-3-(methanesulfonyloxy)-6,6-dimethylbicyclo[3.1.1]heptane

Yield 97.7%. nmr δ ppm(CDCl₃) 0.91(3H,s), 1.22(3H,s), 1.27(1H, d,J=10Hz), 1.37-2.73(14H), 3.03(3H,s), 3.25-4.00(4H), 4.48-4.88(2H).

(1S,2R,3S,5R)-2-[2-(Tetrahydropyran-2-yloxy)ethyl]-3-azido-6,6-dimethylbicyclo[3.1.1]-heptane

Yield 83.2%, nmr δ ppm (CDCl₃) 0.79(3H,s), 1.21(3H,s), 1.34-2.60(15H),3.24-4.05(3H), 4.55(1H,m). ir ν_(max) (film) 2200 cm⁻¹.

(1S,2R,3S,5R)-2-[2-(Tetrahydropyran-2-yloxy)ethyl]-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]heptane

Yield 76.3%. mp 152°-4° C. [α]_(D) ²⁵ -48.9(c 0.791, Methanol), nmr δppm(CDCl₃) 0.76(3H,s), 1.01 and 1.04(each 1/2H,d,J=10 Hz),1.30-2.70(14H), 3.15-4.03(5H), 4.51(1H,br.s), 5.14 and 5.28(each1/2H,d,J=9 Hz), 7.34-7.68(3H), 7.80-8.00(2H). IR νmax (KBr) 3275, 1325,1312, 1168 cm⁻¹

Anal. calcd. for C₂₂ H₃₃ NO₄ S: C, 64.83; H, 8.16; N, 3.44; S, 7.87.

(1S,2R,3S,5R)-2-(2-Hydroxy)ethyl-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]heptane

Yield 89.3%. mp 129°-131° C., [α]_(D) ²⁵ (c 1.041, Methanol), nmr δ ppm(CDCl₃) 0.76(3H,s), 1.07(1H,d,J=10 Hz), 2.15(3H,s), 1.30-2.66(9H),3.45-3.96(3H), 5.68(1H,d,J=9 Hz), 7.35-7.67(3H), 7.86-7.97(2H). IR νmax(KBr) 3460, 3110, 1324, 1306, 1156 cm⁻¹.

Anal. calcd. for C₁₇ H₂₅ NO₃ S: C, 63.13; H, 7.79; N, 4.33; S, 9.91Found: C, 62.97; H, 7.69; N, 4.22; S, 9.78

(+)-(2RS,3aR,4S,6R,7aS)-2-Hydroxy-5,5-dimethyl-1-benzenesulfonyl-4,6-methanoocta-hydroindole:

Yield 78.1%. [α]_(D) ²⁴ +51.4(c 3371, Methanol), nmr δ ppm(CDCl₃) 0.77and 0.83(3H,eachs), 1.06(1H,d,J=9 Hz), 1.18(3H,s), 1.50-4.30(10H), 5.30and 5.59(1H,each m), 7.38-7.70(3H), 7.77-8.00(2H). ir: νmax (CHCl₃)3570, 1348, 1329, 1318, 1310, 1160, 1152 cm⁻¹.

(-)-5(Z)-7-[(1S,2R,3S,5R)-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoicacid and its salt:

Yield 82.0%. [α]_(D) ²³ -31.3(C 3.452, Methanol). CD(Methanol); λnm(Δε): 269(-0.236), 262.5(-0.312), 255.5(-0.321), 223(-4.24). nmr: δppm(CDCl₃) 0.73(3H,s), 1.02(1H,d,J=10 Hz), 1.14(3H, s), 1.33-2.60(14H),3.83(1H,m), 3.12-3.51(3H), 7.37-7.73(3H), 7.87-7.98(2H), 8.86(1H,br.s).IR: νmax (CHCl₃); 3525, 3400, 3280, 1721, 1352, 1330, 1310, 1161, 1095cm⁻¹. Dicyclohexylamine salt: mp 122-124, [α]_(D) ²⁵ -17.6(C 1.051,Methanol). nmr; δ ppm (CDCl₃); 0.73(3H,s), 1.14(3H,s), 0.88-2.43(36H),2.70-3.13(2H), 3.78(1H,br.s), 5.03-5.56(2H), 5.85(1H, br.d,J=6 Hz),7.36-7.67(3H), 7.77-8.03(2H), 8.24(1H,br.s). ir νmax (KBr) 3440, 3180,3080, 1624, 1553, 1310, 1154, 1096 cm⁻¹. Anal. Calcd. for C₃₄ H₅₄ N₂ O₄: C, 69.58; H, 9.27; N, 4.77; S, 5.46. Found: C, 69.55; H, 9.21; N,4.63; S, 5.29.

Sodium salt: IR νmax (KBr) 1560, 1327, 1309, 1160, 1093 cm⁻¹.

Anal. Calcd. for C₂₂ H₃₀ NO₄ SNa: C,61.81; H,7.07; N,3.28; S,7.50.Found: C,61.50; H,7.03; N,3.37; S,7.47.

EXAMPLE 4 ##STR184##(1S,2R,3R,5R)-2-(2-(Tetrahydropyran-2-yloxy)-ethyl)-3-azido-6,6-dimethylbicyclo[3.1.1]heptane2(2R-t)

Diethyl azadicarboxylate (20 g) was added dropwise to a suspension ofthe alcohol 1(2R-c) (6.11 g), triphenylphosphin (30 g) and zincdimethanesulfonate (5.83 g) in benzene (350 ml) at room temperatureunder nitrogen. The mixture was stirred at room temperature for 3 h,washed with water, dried over anhydrous sodium sulfate and concentratedunder reduced pressure. The residue was purified by flash chromatographyon silica gel in hexane ethyl acetate (5:1) to give the crude mesylate(6.7 g). The mesylate was treated with sodium azide by the sameprocedure cited for the preparation of 15 (IV-2, Example 2 (2)), 2.05 g,31.3%. nmr δ (CDCl₃) 0.86(3H, s), 1.21(3H,s), 1.28(1H,d, J=10 Hz),1.40-2.50(14H), 3.22-4.00(5H), 4.57(1H,m).

In the same manner as metioned in IV-2, Example 2, the compound Ih(2R-t)is prepared through the intermediates mentioned below:

(-)-(1S,2R,3R,5R)-2-[2-(Tetrahydropyran-2-yloxy)ethyl]-3-benzenesulfonamdio-6,6-dimethylbicyclo[3.1.1]heptane

Yield 85.6%. mp 119-121. [α]_(D) ²⁵ -26.3(c 0.883, Methanol). nmr δ ppm(CDCl₃) 0.80(3H,s), 1.13(3H,s), 1.20(1H,d,J=10 Hz), 1.35-2.30(14H),2.90-4.10(5H), 4.40-4.60(1H), 5.03 and 5.21(each 1/2H,d, J=6 Hz),7.35-7.68(3H), 7.86-7.97(2H). IR νmax (KBr) 3270, 1322, 1168 cm⁻¹.

Anal. Calcd. for C₂₂ H₃₃ NO₄ S: C, 64.83; H, 8.16; N, 3.44; S, 7.87Found: C, 64.89; H, 8.12; N, 3.42; S, 7.77.

(-)-(1S,2R,3R,5R)-2-(2-Hydroxy)ethyl-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]-heptane

Yield 90.6%. [α]_(D) ²³ -31.6(c 1.094, Methanol). nmr δ ppm(CDCl₃)0.80(3H,s), 1.14(3H,s), 1.21(1H,d,J=10 Hz), 1.35-2.18(8H), 2.30(1H,br.s), 3.20(1H,q,J=9 Hz), 3.57(2H,t,J=6 Hz), 5.65(1H,d, J=7 Hz),7.36-7.63(3H), 7.88-7.99(2H). IR νmax (CHCl₃) 3025, 3530, 3385, 3275,1327, 1310, 1160, 1091 cm⁻¹.

(-)-(1S,2R,3R,5R)-2-Formylmethyl-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]-heptane:

Yield 95.9%. [α]_(D) ²⁴ -19.3(c 2.754, Methanol), nmr δ ppm (CDCl₃)0.82(3H,s), 1.13(3H,s), 1.22(1H,d,J=10 Hz), 1.49-2.78(8H), 3.24(1H, m),5.51(1H,d,J=9 Hz), 7.38-7.73(3H), 7.88-7.99(2H), 9.65(1H,d, J=2 Hz). IR,νmax (CHCl₃) 3390, 3280, 1723, 1330, 1161 cm⁻¹.

(-)-5(Z)-7-[(1S,2R,3R,5R)-3-Benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoic acid (Ih(2R-t))

Yield 95.1%. [α]_(D) ²³ -2.4, [α]₃₆₅ ²³ +17.6(c 2.154, Methanol). nmr δppm(CDCl₃) 0.76(3H,s), 1.13(3H,s), 1.22(1H,d,J=10 Hz), 1.35-2.50(14H),3.20(1H,m), 5.30(2H,m), 5.42(1H,d,J=9 Hz), 7.35-7.63(3H), 7.63(1H,br.s),7.86-7.97(2H). IR νmax (film) 3280, 1710, 1325, 1310, 1160, 1093 cm⁻¹.

(-)-5(Z)-7-[(1S,2R,3R,5R)-3-benzenesulfonamido-6,6-dimethylbicyclo[3.1.1]hept-2-yl]-5-heptenoicacid methyl ester

[α]_(D) ²³ -1.6, [α]₃₆₅ ²³ 24.8(c 2.498, Methanol), CD (Methanol) λnm(Δε): 268.5(+0.085), 261(+0.112), 258 sh(+0.155), 255(+2.52). nmr δ(CDCl₃) 0.76(3H,s), 1.13(3H,s), 1.23(1H,d, J=10 Hz), 1.40-2.43(14H),3.23(1H,m), 3.69(3H,s), 5.30(2H,m), 5.62(1H,d,J=9 Hz), 7.36-7.70(3H),7.92-8.03(2H). IR νmax (film) 3290, 1740, 1329, 1161, 1096 cm⁻¹.

Anal. Calcd. for C₂₃ H₃₃ NO₄ S: C, 65.84; H, 7.93; N, 3.34; S,7.64Found: C, 65.78; H, 7.98; N, 3.42; S, 7.49

Sodium salt of Ih(2R-t): IR νmax (KBr) 1560, 1323, 1308, 1160, 1093cm⁻¹.

EFFECTS OF THE INVENTION

The objective compounds of this invention have potent antagonisticaction to thromboxane A₂ at the receptor, and strongly inhibit plateletagglutination caused by thromboxane A₂. This means that the compounds ofthis invention are expected to be useful antithrombotic andantivasoconstricting drugs. Representative of the compounds of thepresent invention inhibit platelet-agglutinating actions as shown in thefollowing in vitro test.

MATERIAL TESTED AND METHOD

From the carotid artery of a male rabbit (NIBS-JW, body weight 2.2-2.7kg), the technically obtainable whole blood, 7.2 ml each was collectedconsecutively with a plastic syringe containing 0.8 ml of 3.8% sodiumcitrate to make the volumn of each syringe 8.0 ml. The blood was placedin a plastic test tube, mixed by moderate turning and centrifuged for 10minutes at 210 g at 20° C. to give platelet rich plasma (PRP). Theremaining blood was further centrifuged at 3,000 rpm (about 1, 900 g)for 10 minutes at 20° C. to give platelet-poor plasma (PPP).

PRP was diluted with PPP to prepare a sample whose platelet number was5-50×10⁴ /μl. The sample was then subjected to a platelet agglutinationtest.

The platelet agglutination test was performed according to Born's method[Born, G. V. R., Nature, 194, 927-929 (1962)], and the measurement wasmade by an aggregometer (model AUTO RAM-61, Rika Denki Kogyo CO., Ltd.).400 μl of PRP, whose platelet number was prepared to count 50-55×10⁴/μl, was placed in a measuring cuvette and set in the aggregometer. PRPwas stirred for 1 minute (at 1,200 rpm) at 37° C. and preliminarilywarmed. Two minutes after adding the solution of the test compound (50μl saline solution of the compound, or 2 μl dimethylsulfoxide solutionof the compound-48 μl saline) to the cuvette, 50 μl of adenosine5'-diphosphate (ADP: PL-Biochemical Inc.), collagen (Hormon-Chemie,Munchen), or arachidonic acid (sodium salt, Sigma) was added as aplatelet agglutinating agent, and the change in light transmittancecaused by platelet agglutination was recorded against time elasped.

Setting the light transmittance for PRP at 0% of platelet agglutinationrate, and that for PPP at 100%, the maximum light transmittance for thesample PRP after the addition of the platelet agglutinating agent wasregarded as the maximum platelet agglutination rate.

The agglutination inhibition rate (%) was calculated from the ratio ofthe maximum agglutination rate in the test-compound-added group to thatin the control group (carrier-added group).

RESULTS

The results of the test are shown in Table 7.

Prostaglandin (PG) E₁ served as a standard substance.

                  TABLE 7                                                         ______________________________________                                        Platelet aggluti-                                                             nating agent and       Final con-                                                                              Agglutination                                final concentra-                                                                         *Compound   centration                                                                              inhibition                                   tion       number      (μM)   rate (%)                                     ______________________________________                                        (No. 1)                                                                       The results of the compounds (sodium salt)                                    prepared in Example I-1                                                       Arachidonic acid                                                                         12          0.5       9.2                                          500 μM  (Example 8) 1         72.5                                                                2         96.7                                                    14          5         13.9                                                    (Example 8) 10        31.0                                                                20        69.9                                                                40        94.0                                                    19          1         12.3                                                    (Example 13)                                                                              2         78.8                                                                4         90.0                                                    20          1         26.6                                                    (Example 14)                                                                              2         83.0                                                                4         87.2                                         ADP        12          800       3.6                                          30 μM   14          800       -0.2                                                    19          800       -2.3                                                    20          800       4.5                                                     PG E.sub.1  0.2       91.1                                         Collagen   12          800       41.8                                         20 μG/HL                                                                              14          800       29.7                                                    19          800       36.5                                                    20          800       26.3                                                    PG E.sub.1  0.1       100.0                                        (No. 2)                                                                       The results of the compounds described in Example I-1, Table 1.                          23          2.5       2.2                                                     (No. 1)     5         16.5                                                                10        79.1                                                    26          0.25      2.1                                                     (No. 1)     0.5       60.0                                                                1         92.4                                                    29          1.25      0.4                                                     (No. 2)     2.5       10.8                                                                5         29.1                                                                10        78.5                                                    32          1.25      10.4                                                    (No. 2)     2.5       27.9                                                                5         43.8                                                                10        83.2                                                    35          200       6.2                                                     (No. 3)     400       18.4                                                    38          400       6.7                                                     (No. 3)     800       23.8                                                    PG E.sub.1  0.1       13.4                                                                0.2       34.9                                                                0.4       72.0                                                                0.8       99.1                                         (No. 3)                                                                       The results of the compounds prepared in Example I-5                          Arachidonic acid                                                                         9           10        6.1                                          500 μM  (Example 44)                                                                              20        12.7                                                                40        34.5                                                                80        89.5                                                    17          2.5       4.1                                                     (Example 45)                                                                              5         19.6                                                                10        65.7                                                                20        78.7                                                    PG E.sub.1  0.1       13.4                                                                0.2       34.9                                                                0.4       72.0                                                                0.8       99.1                                         (No. 4)                                                                       The results of the compound prepared in Example I-6.                          Arachidonic acid                                                                         I a-ca      5         10.0                                         500 μM  (2S*-c)     10        22.1                                                    (Example 46)                                                                              20        51.9                                                                40        87.3                                                    PG E.sub.1  0.1       13.4                                                                0.2       34.9                                                                0.4       72.0                                                                0.8       99.1                                         (No. 5)                                                                       The results of the compounds prepared in Examples I-7 and I-8.                Arachidonic acid                                                                         I b-ca      25        18.3                                         500 μM  (2S*-t)     50        65.8                                                    (Example 47)                                                                              100       93.3                                                    I b-ca      5         0.5                                                     (2R*-c)     10        18.7                                                    (Example 48)                                                                              20        38.8                                                                40        77.5                                                    I b-ca      0.5       11.0                                                    (2R*t)      1         53.5                                                    (Example 49)                                                                              2         84.5                                                    PG E.sub.1  0.1       13.4                                                                0.2       34.9                                                                0.4       72.0                                                                0.8       99.1                                         (No. 6)                                                                       The results of the compounds prepared in Example II.                          Arachidonic acid                                                                         I e-ac      2         10.1                                         500 μM  (2S*-t)     4         26.0                                                    (Example 1) 8         73.9                                                    PG E.sub.1  0.1       13.4                                                                0.2       34.9                                                                0.4       72.0                                                                0.8       99.1                                         (No. 7)                                                                       The results of the compounds prepared in Example III.                         Arachidonic acid                                                                         I f-ac      2         1.3                                          500 μM  (3S*-β)                                                                              4         30.1                                                    (Example 1) 8         74.5                                                    I f-ac      10        0.9                                                     (3R*-β)                                                                              20        29.2                                                    (Table 3)   40        51.7                                                                80        74.8                                                    I f-ac      5         14.2                                                    (3S*-α)                                                                             10        36.3                                                    (Table 4)   20        82.2                                                    I f-bc      200       6.2                                                     (3S*-β)                                                                              400       30.2                                                    (Table 5)   800       95.8                                                    I f-bc      20        9.0                                                     (3S*-α)                                                                             40        36.0                                                    (Table 6)   80        88.4                                                    PG E.sub.1  0.1       13.4                                                                0.2       34.9                                                                0.4       72.0                                                                0.8       99.1                                         (No. 8)                                                                       The results of the compound prepared in Example IV.                                      I h-ca      50        12.7                                                    (2S-t-5Z)   100       31.2                                                    (Example 1) 200       88.9                                                    I h-ca      400       8.7                                                     (2S-c)      800       30.3                                                    (Example 2)                                                                   PG E.sub.1  0.1       13.4                                                                0.2       34.9                                                                0.4       72.0                                                                0.8       99.1                                         ______________________________________                                         *Compound number corresponds to that used in Example.                    

The objective compounds of this invention show potent inhibitory actionagainst platelet agglutination caused by thromboxane.

The objective compounds of this invention strongly inhibit thromboxaneinduced platelet agglutination, vasoconstriction, andbronchoconstriction. Therefore, clinical application of suchpharmacological action of the compound can be expected, that is, thecompounds can be used for treatment or improvement of such symptoms asarteriosclerosis, myocardial infarction, acute ischemic angina pectoris,circulatory shock, sudden death and so forth. The objective compounds ofthis invention can be administered oral by or parenterally. For example,tablets, capsules, pills, granules, fine subtilaes, solutions,emulsions, suppositories, and injections for intravenous, intramuscular,and subcutaneous administration can be prepared for the compound. Whenthe pharmaceutical preparations of the compounds are prepared, adequatecarriers and fillers are selected from conventionally used carriers andfillers.

The objective compounds of this invention are to be administered to anadult in a daily dose of 10-800 mg.

What we claim is:
 1. A compound of the formula: ##STR185## wherein R₁ isa hydrogen or C₁ -C₅ alkyl; R₂ is an C₁ -C₁₀ alkyl, aryl, aralkyl, orpyridyl, where the aryl, aralkyl, or pyridyl are unsubstituted or aresubstituted by C₁ -C₅ alkyl, C₁ -C₅ alkoxy, nitro, hydroxy, carboxy,amino, C₁ -C₅ alkylamino, C₁ -C₅ dialkylamino whose two alkyl groups maybe different from each other, C₂ -C₃ alkanoylamino, or halogen and X isan C₁ -C₇ alkylene, C₂ -C₇ alkenylene, --CH(F)CH═CH(CH₂)₃ --, --(CH₂)₃--S--(CH₂)₂ --, --(CH₂)₂ --S--(CH₂)₃ --, --C₆ H₄ --O--CH₂ -- or --CH₂CH═CH--m--C₆ H₄ --, or its pharmaceutically acceptable salt.
 2. Thecompound of the formula: ##STR186## wherein R₁ is a hydrogen or C₁ -C₅alkyl; R₂ is an C₁ -C₁₀ alkyl, aryl, aralkyl, or pyridyl, where thearyl, aralkyl, or pyridyl are unsubstituted or are substituted by C₁ -C₅alkyl, C₁ -C₅ alkoxy, nitro, hydroxy, carboxy, amino, C₁ -C₅ alkylamino,C₁ -C₅ dialkylamino whose two alkyl groups may be different from eachother, C₂ -C₃ alkanoylamino, or halogen and X is an C₁ -C₇ alkylene, C₂-C₇ alkenylene, --CH(F)CH═CH(CH₂)₃ --, --(CH₂)₃ --S--(CH₂)₂ --, --(CH₂)₂--S--(CH₂)₃ --, --C₆ H₄ --O--CH₂ -- or --CH₂ CH═CH--m--C₆ H₄ --, or itspharmaceutically acceptable salt.
 3. The compound according to claim 1wherein R₁ is methyl, H or Na and R₂ is phenyl.
 4. The compoundaccording to claim 2 wherein R₁ is methyl, H or Na and R₂ is phenyl. 5.The compound as claimed in claim 1, namely,(1α,2α,3β,5α)-7-5(Z)-(3-benzenesulfonamido-6-oxabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid.
 6. The compound as claimed in claim 1, namely,(1β,2α,3β,5β)-7-5(Z)-(3-benzenesulfonamido-6-oxabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid.
 7. The compound as claimed in claim 2, namely,(1β,2α,3β,5β)-7-5(Z)-(3-benzenesulfonamido-6-thiabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid.
 8. The compound as claimed in claim 2, namely,(1α,2α,3β,5α)-7-5(Z)-(3-benzenesulfonamido-6-thiabicyclo[3.1.0]hexan-2-yl)-5-heptenoicacid.